Bloxerk

+1: Create a 2/1 white Cat creature token with "When you cast an enchantment that targets this creature, give it Lifelink"
-4: Gain control of target creature with converted mana cost 4 or less, when this creature dies, return it to its original controllers control
-X: Give target creature +X/+X and Trample, this ability affects creatures as an enchantment