Interdict Teleport

is a Tier 4 Place + Ward Path Spell.

The caster wards subject volume of space from teleportation. Anyone attempting teleportation into, out of, or through the volume of space will find their teleportation interrupted and emerge at the boundary of the location, as if their teleportation had "run into a wall". At base tier, all teleportation is affected in the affected volume. At Tier 5+, the caster can use envisioning to specify exceptions to the effect (e.g. letting themselves teleport through normally).