Overwhelm

Decks with (n) copies:

4 (4) 2 (2) 1 (1)

Sorcery

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.)
Creatures you control get +3/+3 until end of turn.

The Conclave acts with a single will, expressed by countless warriors.

Collection:

2015 Core Set

Rarity:

Uncommon