Jailbreak in the Etheric Zone

In the continuation of our 5e Land of Azurth campaign, the PCs arrived at the Carnelian Hypercube, a prison for those who have committed "crimes most cosmic" disguised as bounty hunters. They were there to rescue one of the two (known) surviving Super-Wizards at the behest of the other one, Zuren-Ar. He assures them they will able to get past security whereas someone of his vast powers would not be able to.

From the PCs perspective, the hypercube looks like a regular old cube--albeit a gigantic one made of red, semi-precious stone. Every face is patrolled by giant creatures that look like spheres, sectioned like an orange, but with eyes and mouths on the faces of each section that rotate, and ten tentacles in between. These were the Decaton guardians.There eyes shot scanning beams, but the documents the PCs stole and the story they gave got them by. Zuren-Ar had halted his approach at a safe distance so as not to meet these guys.

A pyramidal creature and its one-eyed spheroid flunkies took the prisoners from them. (Including the Lagomorfan the PCs had said they would set free!) When the guards were distracted, the PCs took an a doorway to Cell Block 7. The internal geometry of the hypercube was confusing as up and down shifted between so areas, but luck for the players, they didn't need to go far.

Zuren-Ar had given them a device to locate his beloved Xura, and it led them to her cell. They had to fast-talk some guards, but they remembered Zuren-Ar's admonition to speak with authority to them and keep things simple. Confused guards tended to stop and consult others in their beeping and blipping language, usually giving our heroes time to slip away. So they found her:

by ㅇㅇ JOO

Xura Kru-Ul. She's every bit as imperious as her lover and a bit more unpleasant. Still, a job's a job, so the PCs freed her., despite the warning of the mantid humanoid in the cage next door who claimed she was worse than he was. Of course, he did admit to wiping off all the mammals on his planet. Once Xura was sprung, the guards came running, but outside of her cell, her magic worked and she was able to mass teleport them too...

Well, right in the middle of the guard pyramid, thanks to the disorienting effects of the hypercube. They faced one of the supervisors:

And it called for backup. Our heroes were in battle with at least fifteen guards of various sorts. With the luck of the dice on their side, they were able to cut through them before more reinforcements arrived, though their bard go paralyzed briefly. The group broke away with more of the guards on their heels and managed to make it out through the exit (in a way, the location of the guard pyramid proved to be a lucky break). They caught a glimpse of what might be the warden, a giant being inside a panopticon sphere:

On the outside, the decaton was moving in slooowly. It did scan them with a blast that seemed to shiver the souls of at least a few but had no visible effect.

Zuren-Ar was reunited with Xura Kru-Ul. He teleported the party back to close to the portal to Azurth in gratitude, but announced just before he did, they he and Xura were going off the found an empire.