Bow to My Command

• WWizards of the Coast2017-06-13
  Official Ruling
  Your opponents may tap creatures that came under their control this turn to pay the cost of this scheme’s last ability.
• WWizards of the Coast2017-06-13
  Official Ruling
  To pay the cost of this scheme’s second ability, your opponents collectively need to tap creatures with total power 8 or greater. Those creatures may be controlled by different teammates.
• WWizards of the Coast2017-06-13
  Official Ruling
  If multiple abilities trigger at the beginning of your opponents’ end step, first their abilities are put onto the stack in any order, and then you put your abilities onto the stack in any order. Your abilities resolve before theirs do.
• WWizards of the Coast2017-06-13
  Official Ruling
  In a Supervillain Rumble game, this scheme’s last ability triggers at the beginning of each opponent’s end step. Only that player may tap untapped creatures they control.
• WWizards of the Coast2017-06-13
  Official Ruling
  Once your opponents have chosen to tap creatures, you can’t take any action until they’re tapped and this scheme has been abandoned.
• WWizards of the Coast2017-06-13
  Official Ruling
  If the chosen player leaves the game, this scheme isn’t abandoned, but its middle ability won’t have any effect anymore. You won’t choose a new player.

Rulings via Scryfall