Jar of Steam
This clay jar is warm to the touch. When opened, it creates a cloud of steam that fills the area around it.
Wondrous Item 2,600 gp
Power (Zone) Daily (Standard Action)
When you pull the lid off the jar, hot steam fills a close burst 1 until the end of your next turn. This zone of steam provides concealment to all creatures within it. Any creature other than you that starts its turn within the zone takes 1d6 fire damage. Sustain minor; you must be within 10 squares of the zone.
Published in Adventurer's Vault, page(s) 174.