Baragna, Triumph of the Spore

Baragna, Triumph of the Spore doesn't
untap during its controller untap step.
{2}{b}{t}: Put a mold counter on target creature.
That creature gets a -1/-1 counter during its controller upkeep. A creature can only have one
mold counter placed on it.
Whenever a creature leaves your graveyard untap Baragna, Triumph of the Spore.