Ixeron, Phyrexia Grand Project

Trample, Indestructible, Infect
Ixeron, Phyrexia Grand Project cost {1} less for
each poison counter your opponents have.
Whenever a creature with a -1/-1 counter on it
dies, put a +1/+1 counter on Ixeron, Phyrexia
Grand Project and that creature controller get a
poison counter.