There is a platform, large enough to walk three steps across, in the desert…Once you stand on it, it immediately becomes dusk of a strange color, and the desert temple towers just behind to you…
Under the sewers of a large town ancient burial chambers are discovered. If the PCs investigate they fill find that a pale white flowers grows amongst the graves, in the dark.
How do they survive without light? What is their origin? Why in a burial chamber and not just in any old cave?
Can they be sold or do they have any special quality at all? It is up to the PCs to discover.