Chord of Calling [M15 - 172]

Convoke (Your creature can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of this creature's color.)
Search your library for a creature card with converted mana cost X or less and put it onto the battlefield. Then shuffle your library.

Rarity: Rare

#: 172

Card Type: Instant, Instant

Card Color: G

Casting Cost: {X}{G}{G}{G}