Volim, Unreachable Crusader

Vigilance.

At the beginning of combat each turn, if
Volim, Unreachable Crusader is untapped,
you may tap it. When you do, tap up to X
target untapped creatures that player controls,
where X is Volim's power. If you do this
during your turn, instead, put a +1/+1 counter
on Volim.