Bolas's Citadel [War of the Spark Prerelease Promos] Magic 2010 you may play a land

you may play a land and cast a permanent spell of each permanent type from your graveyard

−8: Each player shuffles their hand and graveyard into their library

Set: Amonkhet Invocations Type: Sorcery Rarity: Mythic Cost: {2}{B}{B} Destroy all creatures

Thief of Blood enters the battlefield with a +1/+1 counter on it for each counter removed this way

They enshrined it

Bolas's Citadel [War of the Spark Prerelease Promos] Magic 2010 you may play a landSet: War of the Spark Prerelease 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.