Zen'Vorka's Cache
From Wowpedia
Zen'Vorka's Cache is sold by Zen'Vorka inside the Sentinel Tree on the Molten Front for 30 
. It provides players with a sink for their excess [Mark of the World Tree].
It contains a random green item, and has small chance (~5%) to contain a 
[Scorched Stone] companion.
Patches and hotfixes
Patch 4.2.0 (2011-06-28): Added.
