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, however the effectiveness of the magic is effected slightly by the barrier itself.

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.