Duskmourn: House of Horror

Appendage Amalgam | Enchantment Creature | Horror | Flash Whenever Appendage Amalgam attacks, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) | Bartek Fedyczak

Popular Egotist | Creature | Human Rogue | {1}{B}, Sacrifice another creature or enchantment: Popular Egotist gains indestructible until end of turn. Tap it. (Damage and effects that say "destroy" don't destroy it.) Whenever you sacrifice a permanent, target opponent loses 1 life and you gain 1 life. | Julia Metzger

Resurrected Cultist | Creature | Human Cleric | Delirium — {2}{B}{B}: Return Resurrected Cultist from your graveyard to the battlefield with a finality counter on it. Activate only if there are four or more card types among cards in your graveyard and only as a sorcery. (If a creature with a finality counter on it would die, exile it instead.) | Tyler Walpole

Unstoppable Slasher | Creature | Zombie Assassin | Deathtouch Whenever Unstoppable Slasher deals combat damage to a player, they lose half their life, rounded up. When Unstoppable Slasher dies, if it had no counters on it, return it to the battlefield tapped under its owner's control with two stun counters on it. | Maxime Minard

Victor, Valgavoth's Seneschal | Legendary Creature | Human Warlock | Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, surveil 2 if this is the first time this ability has resolved this turn. If it's the second time, each opponent discards a card. If it's the third time, put a creature card from a graveyard onto the battlefield under your control. | Jeremy Wilson

Fear of Infinity | Enchantment Creature | Nightmare | Flying, lifelink Fear of Infinity can't block. Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, you may return Fear of Infinity from your graveyard to your hand. | Fernando Falcone

Sawblade Skinripper | Creature | Human Assassin | Menace {2}, Sacrifice another creature or enchantment: Put a +1/+1 counter on Sawblade Skinripper. At the beginning of your end step, if you sacrificed one or more permanents this turn, Sawblade Skinripper deals that much damage to any target. | Zezhou Chen