Duskmourn: House of Horror

Derelict Attic // Widow's Walk | 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, you draw two cards and you lose 2 life. // (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 a creature you control attacks alone, it gets +1/+0 and gains deathtouch until end of turn. | Marc Simonetti

Funeral Room // Awakening 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.) Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life. // (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, return all creature cards from your graveyard to the battlefield. | Miklós Ligeti

Unholy Annex // Ritual Chamber | Enchantment // Enchantment | Room // Room | At the beginning of your end step, draw a card. If you control a Demon, each opponent loses 2 life and you gain 2 life. Otherwise, you lose 2 life. (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 6/6 black Demon creature token with flying. (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.) | Matteo Bassini

Valgavoth, Terror Eater | Legendary Creature | Elder Demon | Flying, lifelink Ward—Sacrifice three nonland permanents. If a card you didn't control would be put into an opponent's graveyard from anywhere, exile it instead. During your turn, you may play cards exiled with Valgavoth. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. | Antonio José Manzanedo

Vile Mutilator | Creature | Demon | As an additional cost to cast this spell, sacrifice a creature or enchantment. Flying, trample When Vile Mutilator enters, each opponent sacrifices a nontoken enchantment, then sacrifices a nontoken creature. | Néstor Ossandón Leal

Shroudstomper | Creature | Elemental | Deathtouch Whenever Shroudstomper enters or attacks, each opponent loses 2 life. You gain 2 life and draw a card. | Campbell White