According to the Encyclopedia, Coblynau can help with achieving life goals and willpower. Does anyone have experience with them?
I only found this review on the CH site:
My Coblynau is the sweetest spirit ever! They are supposed to be ugly, but I admit I fine mine grotesquely cute! I really love him, and I hope others will chose to get a Coblynau too because they are seriously awesome and very underappreciated spirits.