A gamblers lucky ace of hearts card.
Increases critical attack damage by 5%.

When combined with Gambler's Seal:
ASPD +1
Increases critical attack damage by 2%.
Reduces critical damage taken from Player by 2%.
Reduces damage taken from Critical Slash (monster skill) by 100%.
Every 10 increment of base DEX: Increases critical damage by 2%.

If base LUK at least 108:
ASPD +1
Increases critical attack damage by 2%.
Reduces critical damage taken from Player by 2%.

If base LUK at least 120:
ASPD +2
Increases critical attack damage by 4%.
Reduces critical damage taken from Player by 4%.
Normal attack will inflict splash damage.
Job:C All

More Information on Combo:

• Gambler's Seal & Heart Card in Mouth