Avarkhon, Doomed to Hell

Forestwalk, Corrupted (This creature has the supertype Evil and has Ward- {1}{b/r}{b/r} against black and red)
At the beginnning of combat on your turn, target attacking creature gains -1/+2, corrupted, and toxic 1 until end of turn. If
that creature deals combat damage to a
player, put a +1/+1 counter on Avarkhon.