Quest summary: A NPC currently residing somewhere in Othrano managed to get a hold of one of Sotha Sil's time-keeping devices. They've messed with it to the point they were able to turn back time for an hour, but with the result they are now stuck in a time loop, reliving the same hour over and over again.
This is an aura effect, not tied to the location but the NPC and those he interacts with.
The exHlaalu tileset has reuse permissions (attribution required) if all mesh IDs are changed. Since we'de be using this highly modular tileset with new IDs (and CS IDs) anyway, this should not be a problem. What needs to be done is that someone needs to change the 105 exHl_org meshes into fitting IDs and upload that.
Cell: -4,-26 aka Arvud Lower half of this guard tower, interior circled. May have basement but cannot go up further than the level of the door. Probably should not be related to the guard tower above it. Description of function needed.
