MAGIC: THE GATHERING
: Add to your mana pool.
: Add or to your mana pool. Each opponent gains 1 life.
This land is part of such a powerful combo that its counterpart was banned in Modern. In case you haven't seen it before, tapping Grove of the Burnwillows for red mana gains your opponent life, which returns Punishing Fire from your graveyard to your hand. In essence this allows you to cast it over and over. Creature decks beware.