Forbiddance

You create a ward against magical Travel that protects up to 40,000 square feet. Users can't Teleport into the ward or use Portals, such as those created by the gates, to enter the area.
The caster can set an access word to allow other users out or in of the ward, attempting to leave or enter the Ward without using the access word, the target will get damaged.

Effect

Summons a ward around the user.

Manifestation

The ward itself is invisible, unless revealed by another spell, which will appear like a large dome.

Related School

Conjuration