This quest starts in Hunter Village by Talking to Wiseman Chronos.
You can only have the hatchling you wish to change on you.
He sends you off to talk to Fairy MyMyu in the north end of Enchanted Valley.
Fairy MyMyu will require you to summon your hatchling so she may inspect it.
After inspection she will give you four fairy leaves with the instruction of having your hatchling drink from the four fairy trees.
These trees are located south of HV along the mountain line.
If you go to the tunnel entrance and turn right to go where the Karul bugbears are located follow the mountain range across and you will locate the four trees in sequence.
The trees are guarded by three Guardians each.
For each tree you must have you hatchling attack it but not kill it while protecting it from the guardians at the same time.
Have the hatchling attack the trees while you kill the guardians and after he hits the tree 100+ time you will lose one of the fairy leaves. If you have a wind or star make sure you heal the tree so as not to kill it.
Warning: Killing the tree will unleash a multitude of guradians on you, your hatchling and your party.
Warning: Hitting the tree will result in a possible level 9 poison being cast on you by the tree.
Once you have done all four trees go back to speak to Fairy MyMyu you will again ask you to summon your hatchling. Once she has inspected it you will need to return it to the flute and speak to her again. She will transform the fult to a bugle.
Tips: It is best done in a group. If possible have a buffer/healer do the quest with the hatchling so they can heal the tree or hatchling as needed.
A hate tank or other charater with agro will help call the guardians off your hatchling and a good DD/Nuker to kill the guardians to kill them is very helpful too.
If you attempt to do this quest solo get a few Blessed scrolls of Rez for Pets so you hatchling does not delevel.