Unbound Flourishing [Modern Horizons] Duels of the Planeswalkers Promos 2011 It's also the most likely

It's also the most likely to collapse under its own weight

Set: Alpha Edition Type: Sorcery Rarity: Rare Cost: {2}{W}{W} Destroy all creatures

(Piles can be empty

Set: Celebration Cards Type: Sorcery Rarity: Rare Cost: {G}{G}{G}{G} Shuffle all cards in the game together and deal them into three decks

Unbound Flourishing [Modern Horizons] Duels of the Planeswalkers Promos 2011 It's also the most likelySet: Modern Horizons Type: Enchantment Rarity: Mythic Cost: {2}{G} Whenever you cast a permanent spell with a mana cost that contains {X}, double the value of X. Whenever you cast an instant or sorcery spell or activate an ability, if that spell's mana cost or that ability's activation cost contains {X}, copy that spell or ability. You may choose new targets for the copy.