Bolas's Citadel (79) [War of the Spark Promos] Grand Prix Promos X can't be 0

X can't be 0

Set: Conspiracy: Take the Crown Type: Instant Rarity: mythic Cost: {G} Cast this spell only before the combat damage step

Set: Darksteel Type: Artifact Creature — Golem Rarity: rare Cost: {4} Remove a +1/+1 counter from this creature: Put target artifact card from your graveyard on top of your library

You may put an Aura or Equipment card from among them onto the battlefield

Set: Ice Age Type: Land Rarity: rare {T}: Add {C}

Bolas's Citadel (79) [War of the Spark Promos] Grand Prix Promos X can't be 0Set: 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.