Bolas's Citadel - War of the Spark - 79

Legendary Artifact

Mana 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.

Rare · War of the Spark · #79 (WAR)

Illustrated by Jonas De Ro