The dungeon had been chosen by all except Harold, who wanted to study the Marsh of Souls—taking the smuggling job.
Read the following carefully.
He granted them each the power, allowing them to make pockets of space. The gateway into these pockets was limited to, upon creation, ten inches in either direction and was not necessarily required to lead into physical storage. If the gateway was disrupted, it would lapse and would be disconnected with the pocket realm. Harold has been able to retrieve items left in these pocket realms, but other are unable to do so.
(These parameters are important for those who want to be very creative with the powers)
The job was within the Governance Ring of the Third Adjacent, specifically their secure incarceration facility. They were tasked to find their way to cell 592 and attempt to free the prisoner within from government holding. At time 18:00 in five days, the guard detail was being reassigned in a, regular, scheduled ceremony, during which a minimal detail of some five guards formed the security for the facility. The timeframe left them just enough time to travel by tram from the Under Governance to the Third Adjacent and prepare whatever supplies they needed (in reason) for the heist.
Cells 500-600 were more secure than the others, and only a handful of them were occupied. The facility would be guarded by a minor Void-Type Skilled, but they would be the only guard in that specific facility. The note warned them not to take the Skilled lightly, but also to go through the facility as quickly as possible, recommending the west door as both the entrance and exit.
Upon extraction, they would take the person of interest to the enclosed location, not far from the facility but outside of the reach of the Third Adjacent.
Good luck.