This small pyramid is carved from smoky quartz, but upon closer inspection, it appears to be filled with viscous liquid.
Consumable 30 gp
Utility Power (Zone) Consumable (Minor Action)
Effect: Area burst 1 within 5 squares. The burst creates a zone that lasts until the end of the encounter. When a creature enters the zone or starts its turn there, the creature is slowed (save ends).
Published in Dragon Magazine 417.