Agatha's Soul Cauldron

You may spend mana as though it was mana of
any color to activate abilities of permanents you control.
Creatures you control with +1/+1 counters on
them have all activated abilities of all creature
cards exiled with Agatha's Soul 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.