Besides the gray dust, other outer planar artifacts sometimes turn up in the more thaumaturgically-oriented private markets of the City, or end up in some structure of the Ancients to be found be adventurers. Here are a few of them:
Madness record: Condensed from the substance of their realm by the polychromatic clowns of the Plane of Chaos, these appear to be mundane 78rpm phonograph records. If the record is played, all those who are able to hear the strange and indescribable sounds on it will be affected as per the confusion spell.
Fabrication fog: A swarm of minuscule, polyhedral automatons from the Tesseract of Machina, the Plane of Order. These beings are packed into a small square box of some light, but extremely durable alien metal with cautionary text in several different scripts (but no earthly ones) engraved on it. When the box is open the automata appear as a glittering swarm of fly-sized bronze shapes. They will be bound to the one who opens the box and serve him for one year (their power runs out then without recharge), until he is dead, or he gives them to someone else. They act like the fabricate spell, making whatever the owner desires within the restrictions of the spell (other than the need for the craft skill--the automata can manufacture anything non-magical item with a model or reference image). There are rumored to be versions of these which perform healing functions.
2 hours ago