Reyson, Serenes Prince

Flying

Whenever Reyson, Serenes Prince enters the battlefield or a creature you control deals combat damage to a player, you may tap or untap target permanent.

{1}{g}{w}{u}: Put Reyson onto the battlefield from the command zone.

I will remain on the battlefield until Commander Ike tells me he no longer has need of my powers. No one else may command me.