Magewright's Stone [Dissension] Khans of Tarkir Prerelease Promos that player may pay any

that player may pay any amount of mana

Of course they do

sacrifice Junún Efreet unless you pay {B}{B}

Here will we sacrifice her to bring the Great Rekindling to our people

Set: Limited Edition Beta Type: Creature — Zombie Rarity: Rare Cost: {1}{B}{B} Other Zombie creatures have swampwalk

Magewright's Stone [Dissension] Khans of Tarkir Prerelease Promos that player may pay anySet: Dissension Type: Artifact Rarity: Uncommon Cost: {2} {1}, {T}: Untap target creature that has an activated ability with {T} in its cost. The stones hark back to an age before civilization, when the living earth blessed all who trod its untamed wilds.