Charnos, Dark Reaper

Flying, Double-Strike
Charnos, Dark Reaper enters the battlefield with
X +1/+1 counters where X is the amount of life
you lost this turn.
{p/b}, {t}: Put X +1/+1 counters on Charnos, Dark Reaper, where X is the amount of life you lost
this turn. Charnos, Dark Reaper, deals damage
equal to his power to any target.