Multi-Lock

This spell seals an enclosed area: all closing and shuttering devices such as doors, windows, gates, sliding panels, and similar barriers to entry or egress instantly slam shut and wizard lock. The area must be closable along its perimeter: a room, a shuttered pavilion, a hallway of doors, and so on. The spell has sufficient force to dislodge iron spikes and stone or timber props, and can send creatures of up to Huge size sprawling.

The maximum volume that can be covered by a multi-lock is a cube 40 feet per side. The cube increases by 10 feet per caster level above 12th, so a 13th-level wizard affects a 50-foot cube, a 14th-level wizard affects a 60-foot cube, and so on. No closures beyond the immediate area to be sealed will shut, regardless of the maximum area of effect.

Notes: Very rare spell. (Updated from Polyhedron Newszine.)