
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.
Chord of Calling has 12 printings, first in Ravnica: City of Guilds (2005). EDHREC ranks it #520 among Commander cards. It appears most in Kinnan, Bonder Prodigy decks (12,967 on EDHREC). It has 8 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.