Symbiosis is a druid ability, available at level 87. Casting the spell creates a symbiotic link between the druid and the friendly target, granting each the use of a new ability, appropriate to the other's class.
Abilities granted are determined by the receiving character's combat role (as determined by specialization) and the other character's class. A character's combat role does not therefore affect which ability is received by the other player.
Lasts for 1 hour and persists through death.
Abilities granted by this item will appear in the character's spellbook, in the tab corresponding to their current specialization. From there, players can drag the abilities to an action bar.
When the buff expires, the new ability will be replaced with the dummy ability 'Symbiosis'. This is a placeholder ability that has no effect (although using it will still cause your character to dismount). If you regain the Symbiosis effect, this placeholder will transform into the new ability.
The buff cannot be dispelled, spellstolen, or cancelled by the receiving player.
Although based on abilities of the corresponding class, abilities granted through Symbiosis may differ substantially from the originals.
The symbiosis effect is also obtainable through [Overgrown Lilypad], although the effect is limited to the user and is only available in Pandaria.