
Changeling (This card is every creature type.)
Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, counter that spell or ability unless its controller pays {1}.
Unsettled Mariner has 2 printings, first in Modern Horizons (2019). EDHREC ranks it #3,970 among Commander cards. It appears most in Morophon, the Boundless decks (4,219 on EDHREC). 1 public deck on TCG runs it. It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.