
When this creature enters, you become the monarch.
At the beginning of your upkeep, if you're the monarch, creatures you control can't be blocked this turn.
Keeper of Keys has 3 printings, first in Conspiracy: Take the Crown (2016). EDHREC ranks it #12,531 among Commander cards. It appears most in Obeka, Splitter of Seconds decks (2,293 on EDHREC). It has 6 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.