Opus Opposed is a powerful healing Mugic for multi-Tribe decks. In a deck with four Tribes, Opus Opposed is as powerful as the OverWorld Mugic Song of Resurgence, yet it can be cast by a Creature from any Tribe. If you get really tricky and add a fifth Tribe into your deck, this is the best healing Mugic in the game, and it only costs one Mugic counter!
