Bolas's Citadel (Draft Weekend) [War of the Spark Promos]

Bolas's Citadel (Draft Weekend) [War of the Spark Promos]Set: War of the Spark Promos Type: Legendary Artifact Rarity: Rare Cost: {3}{B}{B}{B} You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

sacrifice any number of untapped Forests

Set: Worldwake Type: Creature — Avatar Rarity: Rare Cost: {B} Death's Shadow gets -X/-X

Set: Judgment Type: Sorcery Rarity: Uncommon Cost: {B} Choose a nonland card name

Set: Fifth Edition Type: Enchantment Rarity: Rare Cost: {R}{R} Players can't untap more than one creature during their untap steps

Set: Friday Night Magic 2005 Type: Sorcery Rarity: Rare Cost: {B} Choose a nonland card name

But I doubt it

Set: Conspiracy Type: Creature — Vampire Shaman Rarity: Uncommon Cost: {B}{B} First strike

Set: Planeshift Type: Creature — Human Wizard Rarity: Rare Cost: {W}{U} As Meddling Mage enters the battlefield

Set: Portal Three Kingdoms Type: Creature — Human Soldier Rarity: Common Cost: {2}{W} Liu Bei lost many men at the battle of Runan because of his lack of strategy

{2}: Discard a card

Set: Beta Edition Type: Instant Rarity: Uncommon Cost: {G} Cast this spell only during your declare attackers step

and that player decides whether to flip again