Sheoldred, Whispering One

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.

Sumpftarnung
Bringe zu Beginn deines Versorgungssegments eine Kreaturenkarte deiner Wahl aus deinem Friedhof ins Spiel zurück.
Zu Beginn des Versorgungssegments jedes Gegners opfert dieser Spieler eine Kreatur.