From publisher blurb: 5th Edition Mini-Dungeon for one -OR- four characters of level 17 On the farthest shore of the Astral Plane there is a prison. In fact, there are many prisons. Each occupies the same space, overlapping in the endless dream of two strange minds. The Wardens are the dreamers, and they exist to guard the boundaries between planes. For when the opposed energies of the multiverse clash in open conflict, the fabric of reality grows brittle. If it should ever break, the things that lurk in the cracks between worlds would surely worm their way inside. The Wardens exist to prevent this. It is why they continue to fill the cells of their prisons. It is why they seek to reeducate any creature foolish enough to tamper with planar power. There are many ways to draw the ire of the Wardens. Overuse of the plane shift or gate spells, fomenting interplanar war, or simply drawing the Donjon from the deck of many things can all lead to a stint in the Infinite Prison. This adventure assumes that one of the heroes has suffered this fate, treated to the Wardens’ bizzare hospitality, and can be used as a solo adventure, or begin as the party locates their missing comrade in the Astral Plane.