Voodoo Shangrila

Barrier Magic: Voodoo Shangrila (結界魔法『』) is a Barrier Magic spell.

Description
With an open grimoire, the user creates numerous hexagonal barriers and pieces them together to form a large dome. This barrier blocks both entrance and exit from the contained space and is particularly resilient against attacks. Spatial Magic can be used to escape the dome.

Trivia

 * Shangri-La is a fictional utopia hidden in Tibet.
 * A polar night is one that lasts for more than 24 hours, which periodically happens near the Earth's poles due to the planet's axial tilt and rotation.