Belobog, City of Jarilo-VI

{t}: Add one mana of any color. Activate only
while Belobog, City of Jarilo-VI is a land.
At the beginning of your upkeep, untap all
creatures you control that had a stun counter
removed from it this turn.
As long as Belobog, City of Jarilo-VI is your
active plane, whenever a creature is tapped, put a
stun counter onto it.