Carnage, Knull's Harbinger

Flying, first strike, haste, deathtouch, trample
Whenever a symbiote type creature leaves play
that was dealt damage by Carnage this turn, put
a codex counter on Carnage, Knull's Harbinger.
Carnage, Knull's Harbinger gets +2/+2 for
each codex counter on it.
"The carnage is not the end of something. Rather, it
can be the beginning of everything."