Bolas's Citadel [War of the Spark Prerelease Promos] Werewolf They should be left where

They should be left where we found them

if no creatures are on the battlefield

If that mana is spent on an instant or sorcery spell

Exile any number of target spells

sacrifice Helm of Obedience and put one of them onto the battlefield under your control

Bolas's Citadel [War of the Spark Prerelease Promos] Werewolf They should be left whereSet: 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.