Zombie Master is a rare Creature — Zombie card from Mystery Booster 2 (MB2), collector number 188. Current market price: $0.68 (foil $12.12), TCGplayer market prices via Scryfall.
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."