Yu-Gi-Oh! GX Tag Force Evolution promotional cards

This card becomes an Equip Card, and equips to 1 monster you control. Once per turn, when you inflict damage to your opponent with a card effect, the equipped monster gains 1000 ATK until the End Phase.

Brutal Potion

When your opponent Summons a monster(s), they gain Life Points equal to half the ATK of 1 of the Summoned monsters of your choice.

Dark Cure

Any effect that would make your opponent gain LP inflicts the same amount of damage to them, instead.