The Rock

Apathy (This spell ignores all activated, triggered, targeted and global effects you dont control as well as state-based effects.)
Vigilance, Trample
The Rock's power and toughness are each equal to X.
The Rock is all colors.
Whenever The Rock is dealt damage, it gets +Y+1/+Y+1 until the end of your next turn, where Y is the amount of damage dealt.
The Rock can block any number of creatures.