Zeta Gundam, Waverider Assault

Flying, First Strike

Whenever Zeta Gundam, Waverider Assault attacks, you may tap an untapped creature you control. If you do, prevent all combat damage that would be dealt to Zeta Gundam this turn and it deals damage equal to its power to target tapped creature an opponent controls.

"Transforming mid-battle, the Zeta Gundam strikes before the enemy can react."