Unbound Flourishing [The List] SV022 / And screams of horror

/ And screams of horror rend th' affrighted skies

Set: Champs and States Type: Creature — Elemental Rarity: Rare Cost: {G}{G}{G} Trample

when a Spell Card is activated that targets exactly 1 monster you control (and no other cards): You can negate the activation

Set: Urza's Saga Promos Type: Creature — Dragon Rarity: Rare Cost: {2}{R}{R} Flying

or you who are to be

Unbound Flourishing [The List] SV022 / And screams of horrorSet: The List 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.