WoW lol. I wish I could link youtube vids.
In the vid I seen called ffxiv, glowing tree secrete revealed (sp). People pretty much casted cures around it ran off then "dream toad" appeared and the trees pulsating effects stop. They kill the toad and warp.

From what I seen they timed their cures with the light ala first encounter of the third kind. Though it stoped when it did that then a toad appeares. The ppl in the vid thought something was stuck in the tree. Or possible a glitch.
This is just based on what I saw in the vid.