Mirror Room // Fractured Realm [Duskmourn: House of Horror]

(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.)
Mirror Room
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.
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Fractured Realm
If a triggered ability of a permanent you control triggers, that ability triggers an additional time.