When you unlock this door, destroy all creatures with power 3 or greater.
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Lecture Hall
Other permanents you control have hexproof.
When you unlock this door, destroy all creatures with power 3 or greater. (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.)
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.)
