Mordenkainen's Lost Notebook

Multi-Lock

6-level Transmutation

All windows, doors, or other forms of egress in a 40- foot cube instantly slam shut and are secured with an arcane lock. Each opening is secured with its own arcane lock, which must be dispelled separately.
At higher levels: At higher levels: When you cast this spell using a spell slot of 7th level or higher, the size of the cube increases by 10 feet for each slot level above 6th.