They say the Zombie Master controlled these foul creatures even before his own death, but now that he is one of them, nothing can make them betray him.

Zombiemeister

Alle Zombies erhalten die Fähigkeit Sumpftarnung und "{B}: Regeneration"

Maître des zombies

Signore degli Zombi

Zombie Master

Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)
Other Zombies have "{B}: Regenerate this permanent."

Aetherdrift Commander

Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)
Other Zombies have "{B}: Regenerate this permanent." (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

He controlled the zombies even before his own death; now nothing can make them betray him.

Mystery Booster 2

Other Zombie creatures have swampwalk.
Other Zombies have "{B}: Regenerate this permanent."

Not even the cold embrace of death could keep him from his Prerelease events.