Oracle Text:

(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.
Mana Value: {2}{R} // {4}{R}
Type Line: Enchantment — Room // Enchantment — Room
EDH Color Identity: {R}

Glassworks // Shattered Yard

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