Duskmourn: House of Horror

Gremlin Tamer | Creature | Human Scout | Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, create a 1/1 red Gremlin creature token. | Billy Christian

Inquisitive Glimmer | Enchantment Creature | Fox Glimmer | Enchantment spells you cast cost {1} less to cast. Unlock costs you pay cost {1} less. | Julie Dillon

Niko, Light of Hope | Legendary Creature | Human Wizard | When Niko, Light of Hope enters, create two Shard tokens. (They're enchantments with "{2}, Sacrifice this enchantment: Scry 1, then draw a card.") {2}, {T}: Exile target nonlegendary creature you control. Shards you control become copies of it until the beginning of the next end step. Return it to the battlefield under its owner's control at the beginning of the next end step. | Aurore Folny

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

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

Kaito, Bane of Nightmares | Legendary Planeswalker | Kaito | Ninjutsu {1}{U}{B} ({1}{U}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) During your turn, as long as Kaito has one or more loyalty counters on him, he's a 3/4 Ninja creature and has hexproof. +1: You get an emblem with "Ninjas you control get +1/+1." 0: Surveil 2. Then draw a card for each opponent who lost life this turn. −2: Tap target creature. Put two stun counters on it. | Joshua Raphael

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

Skullsnap Nuisance | Creature | Insect Skeleton | Flying Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, surveil 1. (Look at the top card of your library. You may put it into your graveyard.) | Allen Douglas

Intruding Soulrager | Creature | Spirit | Vigilance {T}, Sacrifice a Room: Intruding Soulrager deals 2 damage to each opponent. Draw a card. | Jeremy Wilson

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

Smoky Lounge // Misty Salon | 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.) At the beginning of your first main phase, add {R}{R}. Spend this mana only to cast Room spells and unlock doors. // (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, create an X/X blue Spirit creature token with flying, where X is the number of unlocked doors among Rooms you control. | Marco Gorlei

Growing Dread | Enchantment | | Flash When Growing Dread enters, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.) Whenever you turn a permanent face up, put a +1/+1 counter on it. | Maxime Minard

Oblivious Bookworm | Creature | Human Wizard | At the beginning of your end step, you may draw a card. If you do, discard a card unless a permanent entered the battlefield face down under your control this turn or you turned a permanent face up this turn. | Josh Newton

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