Essential Material: Exalted Queen's Solitude (Patreon)

The barrier which protects Apocrypha. An automatic ability of the highest class, a constantly-active type power with minimal upkeep. An imitation of the King of Knights’ defensive Noble Phantasm, Avalon: Everdistant Utopia, it is an isolation-type ability that protects the user by removing her from the normal fabric of space and time and placing her in a higher dimension. It is an absolute protection that defends not with raw power, but rather by being beyond reach.

However, it is not as perfect as the original which it copies. Though it can absolutely defend against purely exotic attacks, such as skills or Noble Phantasms that create or alter the fabric of space-time or bend the laws of physics, the barrier itself can be shattered or breached by sufficient force, such as high caliber bullets or explosives of enough power. 

Furthermore, since it cannot itself put her in the land of paradise, Avalon, its isolation is not complete, and so it is not impervious to the True Magics or abilities of a similar class.

Also, though it can absolutely defend against nearly any exotic effect, if that power is also accompanied by an attack sufficient to penetrate the barrier, then even this defense is not enough to protect her.