Synthesis Seals

Seals are special abilities that can be synthesized onto weapons or shields.

Each seal is represented as a single Japanese character (Kanji, Hira, or Kata),
and the color of the seal is based on the source item.
The three colors are: equipment (blue), food/grass (green), and scroll/misc (red).
Some seals like 金 can be found in 2 colors, and have a slightly different effect.

Seals are generally helpful, but some of them are a double-edged sword,
have a pointless effect, or have an outright negative effect, so some care is needed.

The Blacksmith at Shuten Halfway can erase unwanted seals for a fee.
Gyandora and Monsoon Doll special attacks can also remove seals at random.

Seal List

Weapon

SealStackBuySellItemNotes
25001000Ghost SickleDeal x1.5 damage to Ghost type monsters.
10050Drain BusterDeal x1.5 damage to Drain type monsters.
1800900Cyclops KillerDeal x1.5 damage to Cyclops type monsters.
100005000Crescent ArmDeal x1.5 damage to Bomb type monsters.
25001000Dragon KillerDeal x1.5 damage to Dragon type monsters.
150007500Ryujin SwordDeal x2.0 damage to Dragon type monsters.
80004000Froggo Whip30% chance for a defeated enemy to turn into Gitan.
×1000500PickaxeCan dig through walls, but not while inside a wall.
The weapon breaks after digging for a while.
×00GoboCan eat the weapon, restoring 20% fullness.
The weapon is lost when eaten.
×50002500Homing BladeDirect attacks always connect.
Miss Staff overrides this effect.
Does not affect accuracy of thrown items.
50002500Onigiri Sword8% chance for a defeated enemy to turn into an Onigiri.
×30001500Golden SwordUpgrade value never decreases due to rust.
Monsoon Doll doesn't prioritize erasing this seal.
×1000500Dried BonitoCan bite the weapon until its strength reaches 0.
Biting restores 30% fullness and lowers upgrade value by 1.
×2000800Fish SpearDirect attacks can hit underwater monsters.
×20001000Razor WindDirect attacks can hit enemies in a 3-way pattern.
×100005000Healing SwordRestores HP equal to 1/3 of the damage dealt.
The amount only counts out of the target's remaining HP.
(ex: 100 damage vs. monster with 9 HP → restore 3 HP)
×10050Kengo's KatanaDirect attack occasionally flings a weapon.
Damage won't be dealt when this happens.
×50002500Spark SwordConverts your next direct attack into a 100% accuracy
critical hit (x1.5 damage) after missing 2 times.
×100005000Wonder PickCan dig through walls, but not while inside a wall.
The weapon never breaks from digging.
×1500750Disposable SwordLower upgrade value by 1 when a direct attack connects.
×20001000MalletCan destroy traps.
The weapon breaks after a while of destroying traps.
×100005000Iron HammerCan destroy traps.
The weapon never breaks from destroying traps.
30001200Minotaur's Axe35% chance to deal a x1.5 damage critical hit.
1000500Onigiri
(Not Spoiled)
4% chance for a defeated enemy to turn into an Onigiri.
500250HerbRestore 2 HP when a direct attack connects.
800400OtogirisoRestore 4 HP when a direct attack connects.
×600300Life GrassNo effect on its own.
Weapon turns into a Healing Sword if 薬 and 弟 are present.
Seal order doesn't matter, but some weapons are exempt.
600300Strength GrassIncreases weapon strength by 2.
1000500Flame Grass
Dragon Grass
Swing the weapon at full HP to perform a fire attack.
The flame never misses, and deals a fixed 10 damage.
No flame if the target is in direct attack range.
20001000Happy GrassEnemies defeated using direct attacks provide x1.1 exp.
40002000Angel SeedEnemies defeated using direct attacks provide x1.5 exp.
105Unlucky SeedDecreases weapon strength by 2.
×105Disaster SeedSwing the weapon to decrease level by 1.
×1000500Identify ScrollDirect attacks cancel the disguise of N'dubbas and
Copycat Masks, and also reveal invisible monsters.
×1000500Retreat ScrollKeep your weapon if you collapse.
Seal vanishes after use. No effect if the weapon is in a pot.
×500250Purify ScrollWeapon can't be cursed, even if a cursed item is synthesized.
Synthesizing this onto a weapon with 呪 removes the curse,
but the weapon won't gain a 祓 seal afterward.
This seal vanishes if transferred to a different weapon.
800400Slumber Scroll8% chance to inflict sleep when a direct attack connects.
Sleep lasts 5 turns, and the target won't act faster afterward.
×00Plating ScrollUpgrade value never decreases due to rust.
Monsoon Doll will prioritize erasing this seal.
×1000500Silver ArrowRegular attacks can hit monsters inside walls.
The weapon flies forever if thrown or you're disarmed.
×00Dragon Tile BraceletNo effect on its own.
3 中 seals on an Ivory Sword → Daisangen Sword.
×00Unlucky Seed
Disaster Seed
Weapon can't be unequipped.
The curse can be removed by reading a Purify Scroll.

Shield

SealStackBuySellItemNotes
×2000010000Nirvana ShieldSets max fullness to 1 and stops natural fullness depletion.
Fullness is set to 0/1% if equipped when max fullness is 0.
50002000Evasive ShieldIncreases evasion against direct attacks to 35%.
×50002000Echo ShieldReflects hypnosis, magic bullets, and spells.
×50002000Golden ShieldUpgrade value never decreases due to rust.
Monsoon Doll doesn't prioritize erasing this seal.
1000500Leather ShieldHalves hunger rate.
The rustproof ability doesn't transfer if synthesized.
×75003750Dodge ShieldLets you dodge all projectiles.
Dodged projectiles fall to the ground and can trigger traps.
×50002500Holy ShieldProtects all weapons, shields, and bracelets from curses.
Shield can't be cursed, even if a cursed item is synthesized.
Unlike a red 祓 seal, synthesizing a blue 祓 onto a shield
with 呪 won't remove the curse.
2000800Froggo ShieldGain Gitan equal to 10% of damage received.
×30001500Scale ShieldPrevents strength loss from poisons.
Doesn't prevent strength loss from Sluggy licks.
75003000Happy ShieldGain exp equal to x1.3 of damage received.
×30001200Walrus ShieldPrevents items and Gitan from being stolen.
×60002500Reflect ShieldReflects enemy projectiles.
×60003000Traproid ShieldPrevents traps from activating.
25001000Blast ShieldReduces explosion damage by 30%.
1000500Counter ShieldReflects roughly 30% of damage received back at enemy.
40002000Dragon ShieldReduces fire damage by 30%.
×10050Heavy ShieldDoubles hunger rate.
×10050Disposable ShieldLower upgrade value by 1 every time you take damage.
1000500Onigiri
(Not Spoiled)
4% chance for Shiren to turn into an onigiri when hit.
500250HerbRestore 2 HP after receiving damage.
800400OtogirisoRestore 4 HP after receiving damage.
600300Life GrassIncreases shield strength by 2.
1000500Flame Grass
Dragon Grass
Reduces fire damage by 20%.
×800400Antidote GrassPrevents strength loss from poisons.
Doesn't prevent strength loss from Sluggy licks.
20001000Happy GrassGain exp equal to x1.1 of damage received.
40002000Angel SeedGain exp equal to x1.5 of damage received.
105Unlucky SeedDecreases shield strength by 2.
×105Disaster SeedDecrease level by 1 every time you receive damage.
×1000500Identify ScrollReveals disguised Copycat Masks and invisible monsters
that deal damage to you.
×1000500Retreat ScrollKeep your shield if you collapse.
Seal vanishes after use. No effect if the shield is in a pot.
×500250Purify ScrollProtects all weapons, shields, and bracelets from curses.
Shield can't be cursed, even if a cursed item is synthesized.
Synthesizing this onto a shield with 呪 removes the curse,
but the shield won't gain a 祓 seal afterward.
This seal vanishes if transferred to a different shield.
800400Slumber Scroll8% chance to put attacker to sleep when you take damage.
×00Plating ScrollUpgrade value never decreases due to rust.
Monsoon Doll will prioritize erasing this seal.
×1000500Silver ArrowThe shield flies forever if thrown or you're disarmed.
×00Dragon Tile BraceletNo effect on its own.
3 中 seals on an Ivory Shield → Daisangen Shield.
×00Unlucky Seed
Disaster Seed
Shield can't be unequipped.
The curse can be removed by reading a Purify Scroll.

Stacked Effects

Common questions:

  • Does having multiple 回 seals restore more HP? → No, only use 1 回 seal.
  • Does having multiple 弟 seals restore more HP? → Yes, multiple 弟 restores more HP.
  • Do the same seals have to be next to each other to stack? → No, order doesn't matter.

Stacking seals with similar effects:

It's sometimes cost efficient to mix seals with similar effects (天幸, 竜火, に飯, 龍竜, etc.)
rather than synthesizing 16 of the same seal, since multipliers are added together.
Fire damage reduction example: 竜 + 火 = 30% + 20% = 50%, whereas 竜 x 2 = 35%.

Weapon

Seal1234567891011121314151617
仏目
月竜
1.51.61.71.81.92.02.42.73.03.54.04.55.05.56.06.57.0
Damage (multiplier). 竜 only goes up to 16.
1.51.61.71.81.92.02.42.73.05.05.05.05.05.05.05.05.0
Damage (multiplier).
2.02.22.52.73.03.54.05.05.56.06.06.06.06.06.06.06.0
Damage (multiplier).
3035404550556065707580859095969798
Chance enemy is turned into Gitan (%).
812243648606570758085909596979899
Chance enemy is turned into an Onigiri (%).
35404550556065707580859095100100100100
Chance to deal a critical hit (%).
45678910111213141516171819-
Chance enemy is turned into an Onigiri (%).
234567891011121314152030-
Amount of HP restored.
471013151821242730333639424555-
Amount of HP restored.
+2+4+6+8+10+12+14+16+18+20+22+24+26+28+30+32-
Weapon strength increase.
10151820232530333540455055606570-
Fire damage.
1.11.41.72.02.32.62.93.23.53.84.14.44.75.05.15.2-
Experience points (multiplier).
1.52.02.53.03.54.04.55.05.15.25.35.45.55.65.75.8-
Experience points (multiplier).
-10-15-20-25-30-35-40-45-50-55-60-65-70-75-80-85-
Weapon strength decrease. (Doesn't fall below 0)
8101112131415161718192021222324-
Chance to put enemy to sleep (%).

Shield

Seal1234567891011121314151617
3540455055606570758082848586889099
Chance to evade enemy direct attacks (%).
20222529334050566372841001251662505001000
Number of turns to deplete 1% fullness.
1012142024263032354042465052565860
Amount of Gitan gained as a portion of damage (%).
1.32.03.04.05.06.06.16.26.36.46.56.66.76.86.97.07.1
Experience points gained as a portion of damage (multiplier).
3032344044465052556062667072768090
Explosion damage reduction (%).
3035404550556065707580828586889099
Amount of damage reflected back at enemy (%).
3035404550556065707274767880828486
Fire damage reduction (%).
45678910111213141516171819-
Chance to be turned into an onigiri (%).
234567891011121314152030-
Amount of HP restored.
471013151821242730333639424555-
Amount of HP restored.
+2+4+6+8+10+12+14+16+18+20+22+24+26+28+30+40-
Shield strength increase.
20242729313336394246505254565860-
Fire damage reduction (%).
1.11.41.72.02.32.62.93.23.53.84.14.44.75.05.15.2-
Experience points gained as a portion of damage (multiplier).
1.52.02.53.03.54.04.55.05.15.25.35.45.55.65.75.8-
Experience points gained as a portion of damage (multiplier).
-10-15-20-25-30-35-40-45-50-55-60-65-70-75-80-85-
Shield strength decrease. (Doesn't fall below 0)
8101112131415161718192021222324-
Chance to put enemy to sleep (%).

Weapon

SealStackItemNotes
Ghost SickleFewer turns to defeat powerful Gale and Bone Dragon monsters,
along with Pumphantasms before they go inside walls.
Drain BusterOne-shot Drain types to avoid the loss of level, strength, and fullness.
Cyclops KillerEffective against high defense Golem and Ironhead monsters.
It's not necessary for Gazers if you have the 山 seal.
Dragon KillerDragon types are tough to fight at close range, so this helps.
Ryujin SwordStronger version of 竜.
×Homing BladeLets you calculate how many turns it takes to defeat enemies.
Likely 1st or 2nd place in terms of popularity.
×Razor WindGet the first hit in around corners, and plays well with Scout Bracelet.
×Healing SwordFantastic for restoring HP, and greatly impacts difficulty of dungeons.
×Wonder PickDig shortcuts or steal from shops without worrying about it breaking.
Minotaur's AxeCritical hits depend on luck, but effective against all monsters.
Onigiri
(Not Spoiled)
Nearly guarantees you won't starve if used with 皮.
OtogirisoUse with 回 to restore more HP. Plays well with Phantasm Bracelet.
Happy GrassStack multiple 幸 on a secondary weapon to level up early game.
Angel SeedStronger version of 幸, and decent even on a main weapon.
Flame Grass
Dragon Grass
Projectile that never runs out, but only deals a fixed 10 damage.
The flame animation is long, so it slows down the pace of the game.
×Retreat ScrollNice to have if you're worried about losing your weapon.
Remember, the seal won't take effect if the weapon is inside a pot.
×Slumber Scroll8% chance to put an enemy to sleep when your attack connects.
Decent on a weak weapon or if you lack strength to one-shot enemies.
×Plating ScrollProtects other seals from 1 use of Monsoon Doll's special attack.
Required to prevent the loss of upgrade value due to rust.
会 (Minotaur's Axe) vs. 仏ド目月竜龍 (Type Effective Weapons)

The quick answer is that it depends on play style, rather than one being strictly better.
Type effective seals are guaranteed to deal more damage to a selection of monsters,
while the 会 seal has the potential to deal more damage to all monsters.

会:
+ Increase damage to all monsters.
+ Land critical hits without many 会 seals, if you're lucky.
- Chance is based on number of 会 seals. (1 = 35%, and +5% per additional seal)
- Difficult to obtain, since Lv2~3 Taur only appear at the end of post-game dungeons.

仏ド目月竜龍:
+ Increase damage to a selection of monsters.
+ 1 seal is enough for effective results.
- Monsters like Kengo can't be targeted by these seals, making 会 the better option.
- Each selection of monsters takes up 1 seal slot that could be used for something else.
- The seal is useless on floors where strong monsters of the applicable type don't appear.

Shield

SealStackItemNotes
×Nirvana ShieldStops natural fullness depletion, eliminating the need to carry onigiri.
Can be a problem if you lose the shield.
Leather ShieldHalves hunger rate, greatly lowering the risk of starvation.
Evasive ShieldIncreases your chance to evade enemy direct attacks to 35%.
Higher evasion means your bracelets take less damage.
×Echo ShieldMakes you immune to magic bullets, spells, and hypnosis.
×Dodge ShieldDodge all projectiles, including Silver Arrows.
Can't dodge Wolf Droid bombs or Pop Tank cannonballs.
×Holy ShieldProtects weapons, shields, and bracelets from curses.
×Walrus ShieldPrevents Gyandora's plucking from ruining equipment and pots.
×Reflect ShieldReflects all items except for those with piercing properties.
It also reflects monsters thrown by Tiger Tossers.
×Traproid ShieldTraps you step on won't activate.
Prevent accidents, strength loss from Poison Traps, etc.
Blast ShieldReduces damage from cannonballs, landmines, bomber statues, etc.
Stacking 弟 seals counters Pop Tank and Wolf Droid explosions,
so it's mainly used for Big Landmine and Bomber Statue blasts.
Dragon ShieldReduces fire damage by 30% - mainly Dragon family special attacks.
Particularly good to have in Sealed Room.
OtogirisoEffectively reduces the amount of damage you receive.
Great for early game in particular.
Flame Grass
Dragon Grass
Easier to obtain than Dragon Shield.
Use it with 竜 to increase fire damage reduction to 50%.
×Retreat ScrollNice to have if you're worried about losing your shield.
Remember, the seal won't take effect if the shield is inside a pot.
×Purify ScrollProtects weapons, shields, and bracelets from curses.
Slumber Scroll8% chance to put the attacker to sleep when you get hit.
Generally more effective on a shield than a weapon.
×Plating ScrollProtects other seals from 1 use of Monsoon Doll's special attack.
Required to prevent the loss of upgrade value due to rust.
身 (Dodge Shield) vs. 返 (Reflect Shield)

These seals appear similar at first glance, but have some differences.
返 is generally more popular between the two.

身:
+ Dodge all projectiles, and lets you easily collect arrows.
+ Dodge projectiles with piercing properties like Silver Arrows.
- Can't dodge Cannonballs.
- Can't dodge thrown monsters, possibly leading to blocked exits.
- The trap you're standing on will activate if a dodged projectile falls on it.

返:
+ Reflect most projectiles, including items and monsters.
+ Can reflect Cannonballs, though explosions still damage you.
- Reflected items vanish when they hit enemies, so you can't collect items.
- Can't dodge projectiles with piercing properties like Silver Arrows.
- Shopkeepers and Traders turn hostile if a reflected Cannonball damages them.
- Can't reflect items that have already been reflected once in the same turn.
- Slows down the pace of the game.

Pros and Cons in Table Format:

Thrown MonsterCannonballPiercingCollect ItemTrap Activation
NoNoYesYesYes
YesYesNoNoNo

Questionable Seals

Weapon

SealStackItemNotes
×PickaxeSynthesize a Wonder Pick instead to avoid losing your weapon.
(It's safe to dig up to 14 times, but can break after that)
×GoboYou'll lose the weapon if you accidentally select [Eat].
It's worse than か (Dried Bonito) for restoring fullness. (20% vs. 30%)
×Kengo's KatanaYou deal 0 damage when you knock a weapon away from an enemy,
so this essentially makes your attacks miss more often.
×Spark Sword必 (Homing Blade) guarantees that your attacks always connect,
so it's only recommended to synthesize this in Road to the End.
×Disposable SwordLowers weapon upgrade value every time your attack connects.
×MalletGo with 鉄 (Iron Hammer) instead if you want to break traps.
Strength GrassIncrease weapon attack by 2, but it's not worth taking up a slot.
1 strength = 2 weapon attack, so just eat the Strength Grass.
Unlucky SeedNegative seal that simply decreases weapon attack.
×Disaster SeedLowers Shiren's level by 1 every time he swings the weapon.
×Purify ScrollProtects only the weapon with this seal from becoming cursed.
Synthesize this onto a shield to protect bracelets instead.
×Silver ArrowYou lose the ability to synthesize using Mixers, and the weapon
is permanently lost if it gets disarmed by a Kengo monster.

Shield

SealStackItemNotes
×Nirvana ShieldMax fullness doesn't return to normal when the shield is unequipped,
but can be increased again by eating Expand Seeds or onigiri.
Equip the shield when your max fullness is 0% to increase it to 1%.
Evasive ShieldEvading more attacks means reduced effectiveness of 弟, 眠, and バ.
That said, it's usually more advantageous to use this seal.
×Scale ShieldProtects strength from poison arrows, Poison Grass, and Scorpions,
but doesn't block strength lowering Sluggy licks.
Counter ShieldThe stronger your shield, the less damage you reflect.
Rancor Sluggy and Venom Sluggy can divide from reflected damage.
The reflect animation slows down the pace of the game.
Happy ShieldThe stronger your shield, the less exp you gain.
Froggo ShieldThe stronger your shield, the less Gitan you gain.
It doesn't provide much Gitan either way, so it's a wasted slot.
×Heavy ShieldPurely negative seal that doubles your hunger rate.
×Disposable ShieldLowers shield upgrade value every time you receive damage.
Onigiri
(Not Spoiled)
Occasionally turns you into an onigiri when you receive damage.
×Antidote GrassProtects strength from poison arrows, Poison Grass, and Scorpions,
but doesn't block strength lowering Sluggy licks.
Life GrassIncreases shield strength by 2, but not worth a synthesis slot.
Happy GrassThe stronger your shield, the less exp you gain.
Angel SeedSynthesize it onto a weapon instead of a shield.
Unlucky SeedNegative seal that simply decreases shield defense.
×Disaster SeedLowers Shiren's level by 1 every time he receives damage.
×Silver ArrowYou lose the ability to synthesize using Mixers, and the shield
is permanently lost if it gets disarmed by a Kengo monster.