Goreclaw, Terror of Qal Sisma

Creature spells you cast with power 4 or greater cost {2} less to cast.
Whenever Goreclaw, Terror of Qal Sisma attacks, each creature you control with power 4 or greater gets
+1/+1 and gains trample until end of turn.
Goreclaw is actually misunderstood, she is the cuddliest bear in all of Tarkir!