Celestial NightHawk

Equipped creature has "{x}: Put X Marksman
counters on your commander. Activate only as a
sorcery"

Equipped creature has "{r}{r}: Remove X
Marksman counters from your commander.
(where X is the number of marksmen counters on it)
Then deal X damage to target creature. If X is
greater than 10 then you may target player.
Activate only as a sorcery"