Today i was looking item guide on kingofknight, anyway i was checking lune items on there. then i realized 5 different essence similar to the items for master quest. i looked on it and it says
Dim essence of Tree Spirit : collect 20 dim essence of Tree spirit to exchange for one Threthonz's Essence.
(Exchange at Doda/Raon Camp)*
The link is here : King of Knight - Lune Item
and the picture :