Rothdraén, Roar of the Weald

Trample
Battle Cry (Whenever this creature attacks, each
other attacking creature gets +1/+0 until end of turn.)
Whenever you cast Rothdraen or another Bear creature spell, look at the top X cards of your
library, where X is the amount of mana spent to
cast it. You may reveal a creature card with
converted mana cost X or less from among them
and put it into your hand. Put the rest on the
bottom of your library in a random order.