- Rarity: M
- #: 189
- Creature Type or Sub Type: Enchantment
- Rules Text Contains: 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.