The Rock

Apathy (This spell cannot be affected by
targeted, global, triggered or state-based effects)
Vigilance, Trample, Double-Strike
The Rock gets +X/+X, Where X is the value chosen for X as you cast this spell.
The Rock is all colors.
Whenever The Rock is dealt damage, it gets
+X+1/+X+1 until the end of your next turn turn, where X is the amount of damage dealt.
The Rock can block any number of creatures.