Collective Inferno (ECL) #363 [EN/N]

{3}{R}{R} · Enchantment · 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.) As this enchantment enters, choose a creature type. Double all damage that sources you control of the chosen type would deal. · Illustrated by Jason A. Engle · Lorwyn Eclipsed #363 · EDHREC rank 3875 · Magic: The Gathering, MTG