Duskmourn: House of Horror

Charred Foyer // Warped Space | 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 upkeep, exile the top card of your library. You may play that card this turn. // (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.) Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast from exile. | Andrew Mar

Enduring Courage | Enchantment Creature | Dog Glimmer | Whenever another creature you control enters, it gets +2/+0 and gains haste until end of turn. When Enduring Courage 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.) | Yigit Koroglu

Fear of Being Hunted | Enchantment Creature | Nightmare | Haste Fear of Being Hunted must be blocked if able. | Maxime Minard

Fear of Burning Alive | Enchantment Creature | Nightmare | When Fear of Burning Alive enters, it deals 4 damage to each opponent. Delirium — Whenever a source you control deals noncombat damage to an opponent, if there are four or more card types among cards in your graveyard, Fear of Burning Alive deals that amount of damage to target creature that player controls. | J.P. Targete

Fear of Missing Out | Enchantment Creature | Nightmare | When Fear of Missing Out enters, discard a card, then draw a card. Delirium — Whenever Fear of Missing Out attacks for the first time each turn, if there are four or more card types among cards in your graveyard, untap target creature. After this phase, there is an additional combat phase. | John Stanko

Glassworks // Shattered Yard | 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 4 damage 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.) At the beginning of your end step, this Room deals 1 damage to each opponent. | Sergey Glushakov

Leyline of Resonance | Enchantment | | If Leyline of Resonance is in your opening hand, you may begin the game with it on the battlefield. Whenever you cast an instant or sorcery spell that targets only a single creature you control, copy that spell. You may choose new targets for the copy. | Sergey Glushakov

Overlord of the Boilerbilges | Enchantment Creature | Avatar Horror | Impending 4—{2}{R}{R} (If you cast this spell for its impending cost, it enters with four time counters and isn't a creature until the last is removed. At the beginning of your end step, remove a time counter from it.) Whenever Overlord of the Boilerbilges enters or attacks, it deals 4 damage to any target. | Helge C. Balzer

Painter's Studio // Defaced Gallery | 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, exile the top two cards of your library. You may play them until the end of your next turn. // (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.) Whenever you attack, attacking creatures you control get +1/+0 until end of turn. | Marc Simonetti

The Rollercrusher Ride | Legendary Enchantment | | Delirium — If a source you control would deal noncombat damage to a permanent or player while there are four or more card types among cards in your graveyard, it deals double that damage instead. When The Rollercrusher Ride enters, it deals X damage to each of up to X target creatures. | Deruchenko Alexander

Ticket Booth // Tunnel of Hate | 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, manifest dread. // (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.) Whenever you attack, target attacking creature gains double strike until end of turn. | Marco Gorlei

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

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

Disturbing Mirth | Enchantment | | When Disturbing Mirth enters, you may sacrifice another enchantment or creature. If you do, draw two cards. When you sacrifice Disturbing Mirth, 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.) | Nino Vecia