Keiichi, The One and Only

Other Creatures you control get +1/+1.

Survival — At the beginning of your second main phase, if Keiichi, The One and Only is tapped, all creatures you control gain first strike and get +2/+2 until end of turn.

At the beginning of your end step, if Keiichi is the only creature you control, you take 5 damage and sacrifice Keiichi The One and Only.