Narset's Reversal [War of the Spark Prerelease Promos]

Narset's Reversal [War of the Spark Prerelease Promos]Set: War of the Spark Prerelease Promos Type: Instant Rarity: Rare Cost: {U}{U} Copy target instant or sorcery spell, then return it to its owner's hand. You may choose new targets for the copy. "In the disarray of battle, an enemy's attack may be your most convenient weapon." Narset

and other players can't gain control of them

Set: Platinum: Supreme Victors Type: Grass Rarity: Rare Retreat cost: Colorless

that player exiles all cards from their library

Noncreature spells cost {1} more to cast

struck sharp on death

Set: Antiquities Type: Enchantment — Aura Rarity: Uncommon Cost: {U}{U} Enchant artifact

Sacrifice Powder Keg: Destroy each artifact and creature with mana value equal to the number of fuse counters on Powder Keg

When Hazezon leaves the battlefield

Set: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {1}{U}{U} Buyback—Discard two cards

Set: Neo Destiny 1st Edition Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

Set: World Championships 2006 Type: Supporter Rarity: Uncommon

where X is 4 minus the pitch value of the card revealed this way