Hag's Cauldron

You may spend mana as though it were mana
of any color to activate abilities of creatures you control.
Creatures you control with +1/+1 counters on
them have all activated abilities of all creature cards exiled with Hag's Cauldron.
{t}: Exile target card from a graveyard. When
a creature card is exiled this way, put a +1/+1 counter on target creature you control.