Information here: https://www.everquest.com/news/eq-iksar-crate-marketplace-jan-2017
I claimed one instead of the 500 Daybreak cash. I received a "Wrapped Brain in a Jar" (Magic, Heirloom) with the 1-charge effect "Unwrap the Brain in a Jar".
From that, I received "Brain in a Jar" (Magic, No Trade, Heirloom, Placeable" with the clicky effect "Teleport: Tower of Death" which "Opens a mystical portal that teleports you to the Tower of Death in West Cabilis. 10-second cast, 20 hour recast.