Stamp

The stamps menu in-game

Stamps are drops that provide various perks to the character's Main Weapon. To access stamps, the player must first purchase the Stamps upgrade from the Shop for 500 HoloCoins. Once unlocked, there is a chance that enemies drop a stamp on the ground when defeated.

Mechanics

All enemies have a 1/780 chance to drop a stamp when they are defeated. Additionally, Silver YAGOOs are guaranteed to drop a stamp upon being defeated. When a stamp is found and picked up, it automatically pulls up the stamps menu, where the following actions can be done to a found stamp:

Equip it to the Main Weapon, or swap it with an already equipped stamp. Only the character's Main Weapon benefits from the stamp.
Consume it to strengthen an already equipped stamp. The consumed stamp will not appear again for the duration of the battle. Depending on its maximum level, stamps can be strengthened up to two times.
Sell the stamp for a number of HoloCoins. The sold stamp will not appear again for the duration of the battle.
Drop the stamp (without destroying it) by pressing "Finish" with the stamp still in the Found box. The stamp can then be picked up later. Stamps will retain their level when dropped.

Stamps can also be accessed and managed from the pause menu. Equipped stamps will have their icons appear on the upper left corner of the screen, to the right of the HP bar and the Item and Weapon icons.

Up to three stamps can be equipped to a weapon at a time and each stamp, excluding Projectile Up Stamp, can be strengthened to a maximum level of 3. The amount of HoloCoins gained from selling a stamp is affected by the level of the stamp, the stage's coin multiplier and the Money Gain Up shop upgrade.

Note that using an upgraded stamp to strengthen another stamp will still only increase the level by 1.

List of Stamps

ATK Up Stamp

	Weight	4
	Level 1	Increase damage of weapon by 15% and crit damage by 5%.
	Level 2	Increase damage of weapon by 20% and crit damage by 10%.
	Level 3	Increase damage of weapon by 25% and crit damage by 15%.
	Details: The bonus is applied to weapon's base damage, causing it to not affect flat damage bonuses from enhancements and Growth upgrade. This stamp does not affect the swords from Fox Tail Awakened

Bomb Stamp

	Weight	3
	Level 1	Attacks have a 10% chance to cause an explosion that hits nearby targets for 30% of the weapon's damage.
	Level 2	Attacks have a 20% chance to cause an explosion that hits nearby targets for 30% of the weapon's damage.
	Level 3	Attacks have a 30% chance to cause an explosion that hits nearby targets for 30% of the weapon's damage.
	Details: Bomb Stamp can only trigger once per projectile. Bomb Stamp explosion inherits the weapon's enhancements, knockback, on-hit effects and critical modifier. Enemies hit by explosions will also proc the Greed Stamp when equipped, as it is an on-hit effect. Bomb Stamp does not count as main weapon and therefore does not benefit from Growth upgrade.

Cold Stamp

	Weight	3
	Level 1	On hit, if the player does not get attacked by the target for 4 seconds, the target may become Frozen and take 50% cold damage for 3 seconds.
	Level 2	On hit, if the player does not get attacked by the target for 4 seconds, the target may become Frozen and take 60% cold damage for 3 seconds.
	Level 3	On hit, if the player does not get attacked by the target for 4 seconds, the target may become Frozen and take 70% cold damage for 3 seconds.

Crit Up Stamp

	Weight	2
	Level 1	Increase the chance of critical hits caused by this weapon by 10%.
	Level 2	Increase the chance of critical hits caused by this weapon by 20%.
	Level 3	Increase the chance of critical hits caused by this weapon by 30%.
	Details: Crit Up bonus stacks additively with other critical hit chance bonuses.

Greed Stamp

	Weight	3
	Level 1	Attacks have a 3% chance to hit HoloCoins out of targets per hit. Chance and amount is increased for every 10 damage dealt.
	Level 2	Attacks have a 4% chance to hit HoloCoins out of targets per hit. Chance and amount is increased for every 10 damage dealt.
	Level 3	Attacks have a 5% chance to hit HoloCoins out of targets per hit. Chance and amount is increased for every 10 damage dealt.
	Details: Greed Stamp will activate on enemies hit by the Bomb Stamp's explosions. Every 10 weapon damage, up to 100 damage, grants an additional 1% bonus chance. The base value of a coin drop is 1, increased by a random amount between 0 and the previous bonus chance.

Haste Up Stamp

	Weight	2
	Level 1	Reduce the time between attacks by 15%.
	Level 2	Reduce the time between attacks by 20%.
	Level 3	Reduce the time between attacks by 25%.
	Details: Haste Up bonus directly multiplies the weapon's attack time, causing it to stack multiplicatively with Haste stat.

Knockback Stamp

	Weight	3
	Level 1	Weapon causes small knockback. Increase knockback strength by 30% if effect already exists.
	Level 2	Weapon causes small knockback. Increase knockback strength by 50% if effect already exists.
	Level 3	Weapon causes small knockback. Increase knockback strength by 100% if effect already exists.
	Details: Knockback duration: 5/8/12 (0.08 s / 0.13 s / 0.2 s) Knockback speed: 5/8/12

Life Steal Stamp

	Weight	1
	Level 1	Once per second, Weapon attacks may heal a random amount up to 5% of Max HP.
	Level 2	Once per second, Weapon attacks may heal a random amount up to 10% of Max HP.
	Level 3	Once per second, Weapon attacks may heal a random amount up to 15% of Max HP.
	Details: Chance: 15% Despite the name, its healing does not count as life-steal, such as the healing from Nurse's Horn and Eldritch Horror.

Lightness Stamp

	Weight	3
	Level 1	Decrease damage of the main weapon by 20%, and increasing SPD of the character by 20%.
	Level 2	Decrease damage of the main weapon by 20%, and increasing SPD of the character by 30%.
	Level 3	Decrease damage of the main weapon by 20%, and increasing SPD of the character by 40%.

Marking Stamp

	Weight	3 + weapon limit
	Level 1	The first target this weapon hits is marked. The marked target will receive 20% of the damage inflicted on any other targets.
	Level 2	The first target this weapon hits is marked. The marked target will receive 25% of the damage inflicted on any other targets.
	Level 3	The first target this weapon hits is marked. The marked target will receive 30% of the damage inflicted on any other targets.
	Details: Actually increases damage by 20%/30%/40%.

Pacifist Stamp

	Weight	2
	Level 1	Weapon hits have a 10% chance to stun enemies temporarily. Also has a 20% chance to destroy enemy projectiles.
	Level 2	Weapon hits have a 20% chance to stun enemies temporarily. Also has a 30% chance to destroy enemy projectiles.
	Level 3	Weapon hits have a 30% chance to stun enemies temporarily. Also has a 40% chance to destroy enemy projectiles.
	Details: Formerly called the Stun Stamp. Stun duration: 60 (1 s) After an attempt to erase a projectile (either successful or unsuccessful), there is a 1 second cooldown, before the same attack can make a new attempt. Following attacks cannot be erased: Mikodanye's fire breath and lava pools Halloween Ina's potions Smol Ame's and Halloween Bae's ground pounds Shubangelion's smash Self-destruct attacks

Projectile Up Stamp

	Weight	1
	Level 1	Adds 1 additional shot to ranged multi-shot weapons.
	Level 2	Adds 2 additional shots to ranged multi-shot weapons.
	Level 3	[This stamp only goes up to Level 2.]
	Details: Affects all (and only) starting weapons with "Multishot" attack type. See Weapon#Starting weapons for a list of multishot type weapons. Bonus projectiles from Projectile Up Stamp will increase the split count of damage bonuses from enhancements and Growth.

Reverse Stamp

	Weight	3
	Level 1	Weapon will fire backwards. There is no other effect.
	Level 2	Weapon will reverse the reverse effect, thereby now rendering this stamp completely pointless.
	Level 3	Weapon will reverse the reversing of the reverse effect. How many times are you going to do this?

RGB Stamp

	Weight	2
	Level 1	Weapon attacks will look pretty. There is no other effect.
	Level 2	Nothing happens from leveling this up. What are you expecting it to do, rainbow harder?
	Level 3	Please stop it already has all the colors we can't invent new colors.
	Details: This sticker adds a rainbow-colored trail to your weapon.

Size Up Stamp

	Weight	4
	Level 1	Increase attack size by 15%.
	Level 2	Increase attack size by 20%.
	Level 3	Increase attack size by 25%.
	Details: Also affects the "orbit" radius of projectiles. Stacks multiplicatively with other weapon size bonuses, such as Knightly Milk.

Slow Stamp

	Weight	4
	Level 1	Attacks have a 20% chance to slow targets by 15% and deal 30% weapon damage for 5 seconds.
	Level 2	Attacks have a 25% chance to slow targets by 20% and deal 40% weapon damage for 5 seconds.
	Level 3	Attacks have a 30% chance to slow targets by 25% and deal 50% weapon damage for 5 seconds.

Solo Stamp

	Weight	3 + weapon limit
	Level 1	Increase damage by 5% for each empty weapon slot.
	Level 2	Increase damage by 10% for each empty weapon slot.
	Level 3	Increase damage by 15% for each empty weapon slot.
	Details: The bonus is applied to weapon's base damage, causing it to not affect flat damage bonuses from enhancements and Growth upgrade. This stamp does not affect the swords from Fox Tail Awakened

Trumpet Stamp

	Weight	2
	Level 1	Weapon will sound like a trumpet. There is no other effect.
	Level 2	Weapon will doot harder.
	Level 3	It will be harmful if this doots any louder.
	Details: This weapon will add a 'doot' sound effect everytime your weapon attacks. Subsequent upgrades will make the 'doot' louder and more frequent. Doot cooldown: 8/6/4 (0.13 s / 0.1 s / 0.07 s) The played sound effect is different if the stamp is equipped by Kaela.

Unit Stamp

	Weight	1
	Level 1	Decrease damage of the main weapon by 30%, but increase the damage of all other weapons by 4%.
	Level 2	Decrease damage of the main weapon by 40%, but increase the damage of all other weapons by 6%.
	Level 3	Decrease damage of the main weapon by 50%, but increase the damage of all other weapons by 8%.

Weaken Stamp

	Weight	4
	Level 1	Attacks have a 20% chance to reduce ATK and DEF of targets by 20% and 5% temporarily. Flower.
	Level 2	Attacks have a 25% chance to reduce ATK and DEF of targets by 25% and 7% temporarily. Flower.
	Level 3	Attacks have a 30% chance to reduce ATK and DEF of targets by 30% and 10% temporarily. Flower.
	Details: Lasts 3 seconds. Stacks multiplicatively with other effects affecting enemy's ATK. DEF reduction counts as a bonus damage taken debuff, and stacks additively with other similar effets.

History

For full list of changes, see Changelog.

0.6 Release

Added stamps: Cold Stamp, Lightness Stamp, Marking Stamp, Unit Stamp. ^{[Undocumented]}
Fixed ATK Up and Solo stamp damage stacking incorrectly on certain weapons. ^{[Undocumented]}
Updated the following stamps:
ATK Up Stamp
- Has gained the effect of previous Crit Up Stamp.
  - Crit damage increase reduced from 10%/20%/30% to 5%/10%/15%.
Stun Stamp
- This stamp has been renamed to Pacifist Stamp and gained a new effect.
- New effect: has a chance to destroy enemy projectiles.
  - 20%/30%/40% chance
Crit Up Stamp
- The effect has changed from increasing critical damage to critical chance.
  - Grants additional 10%/20%/30% crit.
Greed Stamp
- Chance of hitting HoloCoins out of targets has been reduced significantly.
  - From 10%/15%/20% to 3%/4%/5%.
- Added new effect where the damage of the attack increases the chance of activating the effect as well as the HoloCoin Amount.
  - Chance and amount increased for every 10 damage dealt
Solo Stamp
- The increase to damage has been reduced.
  - From 20%/30%/40% to 5%/10%/15%.