|"Restricted Office // Lecture Hall", |"Bureau privé // Salle de conférence", |"Duskmourn: House of Horror" (2)
Other permanents you control have hexproof.
(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.
Gatherer works better in the Companion app!