The Dominion Bracelet

• WOTC Official Reminder Textofficial rules
  Equip — Equip [cost] ([cost]: Attach to target creature you control. Equip only as a sorcery.)

• WWizards of the Coast2025-07-25
  Official Ruling
  The cost of the activated ability granted by The Dominion Bracelet is locked in before costs are paid. For example, if the power of the equipped creature is 3 (including the +1/+1 granted by The Dominion Bracelet’s ability), the granted ability will cost to activate.
• WWizards of the Coast2025-07-25
  Official Ruling
  You only control the player. You don’t control any of that player’s permanents, spells, or abilities.
• WWizards of the Coast2025-07-25
  Official Ruling
  If the targeted player skips their next turn, you’ll control the next turn the affected player actually takes.
• WWizards of the Coast2025-07-25
  Official Ruling
  You can’t make any illegal decisions or illegal choices—you can’t do anything that player couldn’t do. You can’t make choices or decisions for that player that aren’t called for by the game rules or by any cards, permanents, spells, abilities, and so on. If an effect causes another player to make decisions that the affected player would normally make (such as Master Warcraft does), that effect takes precedence. In other words, if the affected player wouldn’t make a decision, you wouldn’t make that decision on that player’s behalf.
• WWizards of the Coast2025-07-25
  Official Ruling
  You can’t make the affected player concede. That player may choose to concede at any time, even while you’re controlling that player.
• WWizards of the Coast2025-07-25
  Official Ruling
  You also can’t make any choices or decisions for the player that would be called for by the tournament rules (such as whether to take an intentional draw or whether to call a judge).
• WWizards of the Coast2025-07-25
  Official Ruling
  Multiple player-controlling effects that affect the same player overwrite each other. The last one to be created is the one that works.
• WWizards of the Coast2025-07-25
  Official Ruling
  You can use only the affected player’s resources (cards, mana, and so on) to pay costs for that player; you can’t use your own. Similarly, you can use the affected player’s resources only to pay that player’s costs; you can’t spend them on your costs.
• WWizards of the Coast2025-07-25
  Official Ruling
  The player you’re controlling is still the active player during that turn.
• WWizards of the Coast2025-07-25
  Official Ruling
  While controlling another player, you also continue to make your own choices and decisions.
• WWizards of the Coast2025-07-25
  Official Ruling
  While controlling another player, you make all choices and decisions that player is allowed to make or is told to make during that turn. This includes choices about what spells to cast or what abilities to activate, as well as any decisions called for by triggered abilities or for any other reason.

Rulings via Scryfall