A powerful abjuration that seals an entire plane of existence against unwanted extraplanar travel, with customizable conditions for access and exceptions
Abjuration
Action: 1 hour cast time
Components: V,S,M (a gem worth at least 100,000 gp for
each affected plane, which is consumed by the spell)
Duration: Permanent
Spell Lists: Arcane,Divine
Levels: 10
You weave a complex mystical barrier around an entire plane of existence, protecting it against unwanted extraplanar intrusions. When casting this spell, you can specify detailed conditions governing interactions between the protected plane and other planes. These conditions may include restrictions on the types of creatures allowed to enter or exit the plane, specific periods during which planar travel is permitted or forbidden, and designated areas within the plane where planar travel remains possible. You can also define specific objects, spells, or rituals that can bypass the barrier, as well as particular alignments, factions, or individuals exempted from the restrictions.
The planar lock is incredibly powerful, blocking even the most advanced forms of planar travel, including high-level teleportation spells, natural portals, and the innate abilities of certain powerful creatures. This mystical barrier offers unprecedented protection against extraplanar threats while allowing for fine-tuned customization of authorized interactions between planes.
The spell can be beaten in three ways. First, the original caster can choose to lift the lock at any time. Second, by an opposite party mustering a powerful abjuration spell. Third, by a creature succeeding on a Will Save against this spell, given that the DC is equal to the caster's DC+15. Finally, the spell may end if specific conditions, defined at the time of casting, are met.
It is important to note that a plane can only be affected by one Planar Lock at a time. Any attempt to cast a second lock on an already protected plane automatically fails.