Deathbringer

As an additional cost to Deathbringer, pay X life. It gains Menace, Double strike and gets X +1/+1 counters.
{x}{p/u}{p/b}{p/r}{p/r} : Untap Deathbringer, it gets another combat step. it gets X +1/+1 counters until end of turn. You can only activate this ability once per turn.