Beorn, The Berserker

Changeling, First Strike
Boast abilities you activate cost {1} less to activate for each bear you control.
Boast-{3}{g}: Create a 4/4 green Bear creature token with trample. Activate this ability only if this creature attacked this turn, and only once each turn.
If you must know more, his name is Beorn. He is very strong, and he is a skin-changer.
-Gandalf the Grey