Doors to the Unknown (Planescape Adventure Anthology)

Rating:
Summary: Investigation into 500 year old mysteries
Review: Every 500 years 4 doors appear. They lead to unknown locations. Now a new monster that seeks to rule large areas will appear soon.

They key to stopping him lies in these doors.

Very interesting stuff. It might also serve to show that many things live very different lives in the planes. A new type of race is included.

It can also help form future adventures as many will want to know the secret of the 500 year old door appearence cycle and the only ones who have it are the party members.