Malcator, Synthesis Overseer

Artifact creatures you control get +1/+1.
{3}{u}{b}: Another target non-artifact creature gets -3/-3 until end of turn. When that creature dies this turn, return it to the battlefield under your control. It is a colorless artifact in addition to its other types.
"Synthesis is the path to perfection. Those who parish did not deserve it in the first place."