Hope Bringer

Whenever a spell or ability would destroy one or more creatures you control, sacrifice Hope Bringer instead.
4/3
When all is lost in the dark, you look for a lightMogg Berserker

Vengeance 1 (when this spell is played an opponent may pay

. If he or she does, sacrifice this Mogg Berserker.)
2/2
Starting to make sense, but eventually you get to something like:
Savage of the woods

Vengeance
trample
4/4