This item basically grants symbiosis.
The following are the spell exchanges granted:
Death Knight• Wild Mushroom: Plague as Frost, Unholy• Might of Ursoc as Blood
Warrior• Stampeding Shout as Arms, Fury• Savage Defense as Protection
Paladin• Wrath as Retribution• Barkskin as Protection• Rebirth as Holy
Monk• Bear Hug as Windwalker• Entangling Roots as Mistweaver• Survival Instincts as Brewmaster
Shaman• Solar Beam as Elemental, Enhancement• Prowl as Restoration
Mage• Healing Touch
Priest• Tranquility as Shadow• Cyclone as Holy, Discipline
This item only works in Pandaria, and does not function in cities, instances, arenas or battlegrounds.