Chord of Calling [Ravnica: City of Guilds] Instant you may put that card

you may put that card onto the battlefield

Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {1} As Pithing Needle enters the battlefield

Set: Fourth Edition Type: Creature — Bird Rarity: Rare Cost: {G} Flying

Set: Duel Decks Anthology Type: Instant Rarity: Common Cost: {3}{B} If you control a Swamp

Chord of Calling [Ravnica: City of Guilds] Instant you may put that cardSet: Ravnica: City of Guilds Type: Instant Rarity: Rare Cost: {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.