Unit J, Designed Slayer

First strike, menace, afflict 3

When this creature deals combat damage to a player, you
may pay {w}{u}{b}. If you do, exile target permanent card from that player's graveyard. Create a token that’s a copy
of it, except it’s a 2/2 colorless artifact creature Horror.

{3}{u/b}, Sacrifice another creature: Distribute X +1/+1 counters on up to X artifact creatures you control, where
X is the sacrificed permanent's mana value. If the sacrificed permanent is an artifact, surveil 2.