Vampire Stiletto: Weapon (5 Dark) [RARE]Deal 4 damage per turn, returned to you as healing.Sap (2 Dark): Reduce the ATK of the target creature by 3. The amount reduced is returned to you as healing.How about this?
A card can only have one active ability. However, it can have multiple passive abilities.Look at Devourer. It has both Burrow and that quanta-absorbing ability.