Put a +1/+1
counterTo counter a spell or ability is to cancel it: remove it from the stack without resolving it. A counter on an object or player is instead a marker that changes characteristics or interacts with rules or abilities; for example, a +1/+1 counter modifies a creature’s power and toughness. (CR 701.6; 122.1) on target creature you control. Then it fights target creature an opponent controls. When the creature an opponent controls
diesIs put into a graveyard from the battlefield. (CR 700.4) this turn, if you control your
commanderA designated card for a Commander deck, governed by the command-zone, color-identity, and Commander rules. (CR 903), you become the
monarchThere are two inherent triggered abilities associated with being the monarch. These triggered abilities have no source and are controlled by the player who was the monarch at the time the abilities triggered. This is an exception to rule 113.8. The full texts of these abilities are “At the beginning of the monarch’s end step, that player draws a card” and “Whenever a creature deals combat damage to the monarch, its controller becomes the monarch.” (CR 725.2).