Sheoldred, Whispering One - March of the Machine: Multiverse Legends (MUL)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
At the beginning of your upkeep, return target creature card from your graveyard to the battlefield.
At the beginning of each opponent's upkeep, that player sacrifices a creature.

• Rarity: Mythic
• #: 16
• Card Type: Legendary, Creature
• Casting Cost: {5}{B}{B}