Chord of Calling
Instant{X}{G}{G}{G}
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.
Colour identity Green · Convoke
In short
Chord of Calling has 10 listed printings; the most valuable is the Retro Frame · Serialized printing from RVR at US$700.00 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
Every Chord of Calling printing
Retro Frame · Serialized
Chord of Calling
RVR · 345z
TCGplayer market
US$700.00
Secret Lair · Rainbow Foil
Chord of Calling
SLD · 1595
TCGplayer market
US$38.59
Secret Lair
Chord of Calling
SLD · 1595
TCGplayer market
US$29.80
Secret Lair
Chord of Calling
SLD · 2376
TCGplayer market
US$10.60
Chord of Calling
M15 · 172
TCGplayer market
US$7.91
Chord of Calling
2XM · 158
TCGplayer market
US$7.88
Chord of Calling
RVR · 134
TCGplayer market
US$7.86
Launch Party
Chord of Calling
2XM · 384
TCGplayer market
US$7.59
Chord of Calling
RAV · 156
TCGplayer market
US$7.32
Retro Frame
Chord of Calling
RVR · 345
TCGplayer market
US$7.04