Od, Bulwark of the Guildless

At the beginning of your upkeep, tap all untapped creatures you control and tap and put stun counters on that many target creatures your opponents control.
{1}: Untap target creature you control. Orn's controller creates a treasure token. This ability can only be activated by your opponents and only during their upkeep.
This creature cannot become tapped. (It can’t pay tap costs)