
Flying
Whenever a source deals damage to this creature, that source's controller mills that many cards.
Belltower Sphinx has 5 printings, first in Ravnica: City of Guilds (2005). EDHREC ranks it #20,180 among Commander cards. It appears most in Szadek, Lord of Secrets decks (29 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.