Ravenh, Corvian Hunter

{t}: Ravenh, Corvian Hunter phases out.
{t}, {u}: Target creature you control phases
out. Put a +1/+1 counter on Ravenh,
Corvian Hunter.
{t}, {b}{b}, Remove X +1/+1 counters from
Ravenh, Corvian Hunter: Destroy target
permanent with mana value X or less.