Mana Vortex [The Dark] Dragon Wurm The owner of each creature

The owner of each creature card revealed this way with the lowest mana value puts it onto the battlefield

The same is true for creature spells you control and creature cards you own that aren't on the battlefield

Set: Dominaria Prerelease Promos Type: Legendary Artifact — Vehicle Rarity: Mythic Cost: {4} Flying

Set: Conspiracy Type: Artifact Rarity: Mythic Cost: {4} Will of the council — At the beginning of your upkeep

Mana Vortex [The Dark] Dragon Wurm The owner of each creatureSet: The Dark Type: Enchantment Rarity: Rare Cost: {1}{U}{U} When you cast this spell, counter it unless you sacrifice a land. At the beginning of each player's upkeep, that player sacrifices a land. When there are no lands on the battlefield, sacrifice Mana Vortex.