Dungeons & Dragons: Adventures in the Forgotten Realms

Acererak the Archlich | Legendary Creature | Zombie Wizard | When Acererak the Archlich enters the battlefield, if you haven't completed Tomb of Annihilation, return Acererak the Archlich to its owner's hand and venture into the dungeon. Whenever Acererak the Archlich attacks, for each opponent, you create a 2/2 black Zombie creature token unless that player sacrifices a creature. | Andrey Kuzinskiy

Vampire Spawn | Creature | Vampire | When Vampire Spawn enters the battlefield, each opponent loses 2 life and you gain 2 life. | Alex Brock

Yuan-Ti Fang-Blade | Creature | Snake Rogue | Deathtouch Whenever Yuan-Ti Fang-Blade deals combat damage to a player, venture into the dungeon. (Enter the first room or advance to the next room.) | Simon Dominic

Skullport Merchant | Creature | Dwarf Citizen | When Skullport Merchant enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") {1}{B}, Sacrifice another creature or a Treasure: Draw a card. | Aaron Miller