
You have hexproof. (You can't be the target of spells or abilities your opponents control.)
Each opponent can't venture into the dungeon more than once each turn.
Keen-Eared Sentry has 1 printing, first in Adventures in the Forgotten Realms (2021). EDHREC ranks it #20,278 among Commander cards. It appears most in Barrowin of Clan Undurr decks (21 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.