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

Meat Locker // Drowned Diner | 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, tap up to one target creature and put two stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.) // (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, draw three cards, then discard a card. | Sergey Glushakov

Mirror Room // Fractured Realm | 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, create a token that's a copy of target creature you control, except it's a Reflection in addition to its other creature types. // (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.) If a triggered ability of a permanent you control triggers, that ability triggers an additional time. | Helge C. Balzer

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

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