Niblis of Frost [Eldritch Moon] Vanguard when an opponent’s monster declares

when an opponent’s monster declares an attack: You can change the attack target to this card and perform damage calculation

") During the End Phase: Shuffle this card into the Extra Deck

Set: Magic 2012 Type: Instant Rarity: Uncommon Cost: {1}{R} This spell can't be countered

Set: Explorers of Ixalan Type: Sorcery Rarity: Rare Cost: {4}{U}{U}{U} For each opponent

Niblis of Frost [Eldritch Moon] Vanguard when an opponent’s monster declaresSet: Eldritch Moon Type: Creature Spirit Rarity: Rare Cost: {2}{U}{U} Flying Prowess (Whenever you cast a noncreature spell, this creature gets +1 +1 until end of turn.) Whenever you cast an instant or sorcery spell, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.