I have 3 Egg Of Earth C grade but I do not know for what they are used. Thus say to me if you know has what are used eggs of Eart C grade and their price.

Thx

eggs C grade are almost useless

eggs have 2 functionnalities
1° buy items near adventurer
2° get clan skill

for clan skill you need A grade eggs and only A grade.
to buy items you need lots of eggs of the grade you want to buy (C and B grade only)
check the adventurer npc to have list of buyable item
each adventurer have his own list of items

Thanks Si j'avais sû que c'était toi qui répondrais, j'aurais posté dans la partie FR ^^ je vais le mettre tiens