Bolas's Citadel [War of the Spark] High-Speed Riders you can take control of

you can take control of That monster up to the End Phase

by Tributing 1 monster they control

Whenever Hypnotic Specter deals damage to an opponent

−2: Create Ashaya

Search your library for an artifact card and put that card onto the battlefield

Bolas's Citadel [War of the Spark] High-Speed Riders you can take control ofSet: War of the Spark 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 converted mana cost rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.