Duskmourn: House of Horror

Central Elevator // Promising Stairs | Enchantment // Enchantment | Room // Room | (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.) When you unlock this door, search your library for a Room card that doesn't have the same name as a Room you control, reveal it, put it into your hand, then shuffle. // (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.) At the beginning of your upkeep, surveil 1. You win the game if there are eight or more different names among unlocked doors of Rooms you control. | Cristi Balanescu

Enduring Curiosity | Enchantment Creature | Cat Glimmer | Flash Whenever a creature you control deals combat damage to a player, draw a card. When Enduring Curiosity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.) | Julie Dillon

Entity Tracker | Creature | Human Scout | Flash Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, draw a card. | Cristi Balanescu

Leyline of Transformation | Enchantment | | If Leyline of Transformation is in your opening hand, you may begin the game with it on the battlefield. As Leyline of Transformation enters, choose a creature type. Creatures you control are the chosen type in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield. | Sergey Glushakov

Marina Vendrell's Grimoire | Legendary Artifact | | When Marina Vendrell's Grimoire enters, if you cast it, draw five cards. You have no maximum hand size and don't lose the game for having 0 or less life. Whenever you gain life, draw that many cards. Whenever you lose life, discard that many cards. Then if you have no cards in hand, you lose the game. | Denys Tsiperko

The Mindskinner | Legendary Enchantment Creature | Nightmare | The Mindskinner can't be blocked. If a source you control would deal damage to an opponent, prevent that damage and each opponent mills that many cards. | Abz J Harding

Silent Hallcreeper | Enchantment Creature | Horror | Silent Hallcreeper can't be blocked. Whenever Silent Hallcreeper deals combat damage to a player, choose one that hasn't been chosen — • Put two +1/+1 counters on Silent Hallcreeper. • Draw a card. • Silent Hallcreeper becomes a copy of another target creature you control. | Joshua Raphael

The Tale of Tamiyo | Legendary Enchantment | Saga | (As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.) I, II, III — Mill two cards. If two cards that share a card type were milled this way, draw a card and repeat this process. IV — Exile any number of target instant, sorcery, and/or Tamiyo planeswalker cards from your graveyard. Copy them. You may cast any number of the copies. | Anna Pavleeva

Leyline of Mutation | Enchantment | | If Leyline of Mutation is in your opening hand, you may begin the game with it on the battlefield. You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast. | Sergey Glushakov

Restricted Office // Lecture Hall | Enchantment // Enchantment | Room // Room | (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.) When you unlock this door, destroy all creatures with power 3 or greater. // (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.) Other permanents you control have hexproof. | Antonio José Manzanedo

Nashi, Searcher in the Dark | Legendary Creature | Rat Ninja Wizard | Menace Whenever Nashi, Searcher in the Dark deals combat damage to a player, you mill that many cards. You may put any number of legendary and/or enchantment cards from among them into your hand. If you put no cards into your hand this way, put a +1/+1 counter on Nashi. | Johan Grenier

Roaring Furnace // Steaming Sauna | Enchantment // Enchantment | Room // Room | (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.) When you unlock this door, this Room deals damage equal to the number of cards in your hand to target creature an opponent controls. // (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.) You have no maximum hand size. At the beginning of your end step, draw a card. | Miklós Ligeti

Zimone, All-Questioning | Legendary Creature | Human Wizard | At the beginning of your end step, if a land entered the battlefield under your control this turn and you control a prime number of lands, create Primo, the Indivisible, a legendary 0/0 green and blue Fractal creature token, then put that many +1/+1 counters on it. (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31 are prime numbers.) | Ekaterina Burmak

Marina Vendrell | Legendary Creature | Human Warlock | When Marina Vendrell enters, reveal the top seven cards of your library. Put all enchantment cards from among them into your hand and the rest on the bottom of your library in a random order. {T}: Lock or unlock a door of target Room you control. Activate only as a sorcery. | Magali Villeneuve

Floodfarm Verge | Land | | {T}: Add {W}. {T}: Add {U}. Activate only if you control a Plains or an Island. | Randy Gallegos

Gloomlake Verge | Land | | {T}: Add {U}. {T}: Add {B}. Activate only if you control an Island or a Swamp. | Marco Gorlei