Chord of Calling 172 (Magic 2015 (M15))

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.

NM - $11.80
LP - $9.50
MP - $7.10
HP - $4.80
DMG - $2.40