Volibear, The Relentless Storm

Creature spells you cast with power 4 or greater cost {2} less to cast.
Whenever Volibear attacks, each creature you control with power 4 or greater gets +1/+1 and gains trample until end of turn.

To some, he is the Thunder’s Roar, the Greatstorm, or Valhir. To others, he is Ruin, the Thousand-Pierced Bear, or He Who Stands. But to most of the tribes who still hold to the old ways, he is known as the Volibear.