Urborg Volcano [Starter Commander Decks] Release Special Booster Ver.1.0 then sacrifice that creature unless

then sacrifice that creature unless you pay an amount of E equal to its mana value

Domain — Whenever Sphinx of Clear Skies deals combat damage to a player

Set: Throne of Eldraine Type: Creature — Faerie Rarity: Uncommon Cost: {3}{B}{B} Flying

Enchanted creature gets +4/+4

The Simic soon discovered that the sky offered as few constraints on size as the sea

Urborg Volcano [Starter Commander Decks] Release Special Booster Ver.1.0 then sacrifice that creature unlessSet: Starter Commander Decks Type: Land Rarity: Uncommon Urborg Volcano enters the battlefield tapped. T: Add B or R. Deep in the heart of Urborg lie massive volcanoes whose thick black smoke covers the land with perpetual darkness.