Chord of Calling

Decks with (n) copies:

51 (4) 3 (3) 5 (2) 1 (1)

Instant

Oracle text:

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 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.

Collection:

2015 Core Set

Rarity:

Rare