For someone like Jamie, his level of Spatial Mastery wasn't something he could get without at least a 'Monarch' Rank Time Authority.
Not like Jamie needed to comprehend laws anymore. He'd gone past the comprehension stage and the assimilation stage right after it.
From the Sub-Cosmic Realms (After Surpassing the Peak of the Universe), one needed to Assimilate the laws they comprehended, then coined an Aspect out of it which would be their 'Main' Damage Source.
They'd need to scale through the Firmaments, reforging their Souls with Cosmic Energy, then fuse their Origin Cores to create Dictums, increase the ranks of those Dictums, Integrate them into their existence, then it was compulsory to become Higher Dimensional and then all that's left is to accumulate raw energy.
There’s no one with experience of having broke into Estea’s Underworld.
Besides Jamie who did it to test the security.
Everyone else is dead.