The Spawning Stone

({t}: add {c} to your mana pool)
Protection from spells and creatures.
Opponents can't gain control of your permanents
by any means. If an opponent controls a creature
you own, they must sacrifice it.
If you do not control a Black Slaad, you may pay
2 life and discard a card. If you do, transform one
of your Green Slaad into a Black Slaad. If you do
not control a Green Slaad, create a Green Slaad
creature token that has the same abilities first.