Potent Snow Berries

Comes into play with 2 Nopeberry counters on it.
At the end of your turn, if there are no more Nopeberry counters on Potent Snow Berries, put
it in your graveyard. Any creature that has a Nopeberry counter on it gets -3/-3 until counter
is removed.
{b}{g},{t}: put a Nopeberry counter on Potent
Snow Berries.
{b/g}: move a Nopeberry counter from Potent Snow Berries to target creature.