March 7th

When March 7th enters, tap up to one target creature you don't control and put a stun counter on it.

{2}{u}, {t}, Put an ult counter on March 7th: Until end of turn, target creature gains indestructible and "Whenever this creature attacks, all creatures able to block it must do
so."

{4}{u}{u}, {t}, Remove three ult counters from March 7th: Tap all creature you don't control. Put a stun counter on each creature tapped this way.