Haste At the beginning of your upkeep, if Nether Shadow is in your graveyard with three or more creature cards above it, you may put Nether Shadow onto the battlefield.
{T}: Choose target non-Wall creature the active player has controlled continuously since the beginning of the turn. That creature attacks this turn if able. Destroy it at the beginning of the next end step if it didn't attack this turn. Activate only during an opponent's turn, before attackers are declared.
Enchant creature When Paralyze enters the battlefield, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step. At the beginning of the upkeep of enchanted creature's controller, that player may pay {4}. If the player does, untap the creature.
At the beginning of the end step, if no creatures are on the battlefield, sacrifice Pestilence. {B}: Pestilence deals 1 damage to each creature and each player.
"They groaned, they stirred, they all uprose, Nor spake, nor moved their eyes; It had been strange, even in a dream, To have seen those dead men rise." —Samuel Coleridge, "The Rime of the Ancient Mariner"
At the beginning of each end step, put a corpse counter on Scavenging Ghoul for each creature that died this turn. Remove a corpse counter from Scavenging Ghoul: Regenerate Scavenging Ghoul.
You gain life equal to the damage dealt to you this turn. Simulacrum deals damage to target creature you control equal to the damage dealt to you this turn.
"About, about, in reel and rout The death-fires danced at night; The water, like a witch's oils, Burnt green, and blue and white." —Samuel Coleridge, "The Rime of the Ancient Mariner"
Look at target opponent's hand and choose a card from it. You control that player until Word of Command finishes resolving. The player plays that card if able. While doing so, the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card. If the chosen card is cast as a spell, you control the player while that spell is resolving.
Other Zombie creatures have swampwalk. Other Zombies have "{B}: Regenerate this permanent."
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.