Khenra Spellspear

Trample Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) 3(U/P): Transform Khenra Spellspear. Activate only as a sorcery. ((U/P) can be paid with either U or 2 life.) // Gitaxian Spellstalker Trample, ward 2, prowess, prowess (Each instance of prowess triggers separately.)

"Bolas's methods were crude and inefficient, taking generations to refine the population into a reliable source of combat units. Still, it offers us something of a head start." —Jin-Gitaxias