Willa

+1: Place a 'tinker' counter on up to 2 target artifacts. Tinker counters can be spent as converted charges for abilities or as any color mana.
-1: Deal 2 damage to target creature. If a creature is destroyed this way, deal 2 damage to all opponents and their planeswalkers
-1: The next artifact spell you cast does not include colored mana in its cost this turn.