Leo, Noble Beast

Vigilance, Trample.
{g}{t}: Add {g}{g}. Put a hunger counter on Leo.
{b}: Sacrifice a creature. Target creature gets -1/-1
until end of turn. Put a hunger counter on Leo.
At any time, if Leo, Noble Beast has at least 4
hunger counters, you may transform him.
Many have challenged Leo, defender of the
Treefort. None have survived his hunger."