Astral Prison of the Dragon Lord

Publisher's blurb: This prison is deteriorating, revealing patches of the astral plane where the floor has crumbled away. At the end waits a throne engraved with the heads of dragons… With this map and its detailed one-shot adventure prompt, you’ll save so much time as you prepare for a fun session. The battlemap comes ready for both VTTs and easy home (or professional) printing—so you can use it no matter how you prefer to run your sessions!