If you would put one or more
countersTo 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 a creature or planeswalker you control or on yourself, put that many plus one of each of those kinds of
countersTo 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 that permanent or player instead.
Choose a BackgroundThis ability allows a legendary creature to be your commander alongside a Background with the stated relationship. (CR 702.124) (You can have a Background as a second
commanderA designated card for a Commander deck, governed by the command-zone, color-identity, and Commander rules. (CR 903).)