Gibbering Amalgam

Delve
Gibbering Amalgam enters the battlefield with X
+1/+1 counters on it, where X is the number of
cards exiled to cast it.
Whenever a creature you control dies, you may
exile that card from your graveyard and put a
+1/+1 counter on Gibbering Amalgam.
"Perfect!" — Stitcher Geralf