wimpod pokemon card TCG - SM - Burning Shadows If heads Wimpod (Storm Emeralda 8) -

Exert abilities are linked to either the attacking creature or to one of its tap abilities, and vigilance doesnt let me do either more than once per turn

It has just one Strength and two Willpower, plus a single quest value

Just be wary of enchanting an artifact thats likely to die, like a creature

Alternatively, you could spend a few million to get hold of one, if you can find any available

Two such demons are Bloodgift Demon, a creature that makes a player pay 1 life and draw a card and Charmbreaker Devils, a big flyer that gets bigger when you cast an instant or sorcery and them brings back from the grave each upkeep