I arady tried to do a fairy skill quest
it kinda hard =.=
it took almost 3 hrs to finish even all my helpers r hi lvl

-U must fight valkyrie's trainees in order to get the skill
My advice is
--->to kill the earth trainee 1st
coz their skill(idk the name)looks like meteor strike
will consume lot of ur hp.\\\\\
--->its better to ave two hi lvl water element in ur
team and must be speed up to 400spd coz the trainee spd is around 400
--->Last things.prepare 7 star\\\
ive been scolded by all my friend coz i wasted their times on diz quest
but dun ave enough star to redeem "-.-\\\

this link can help:)

http://forum.wl.igg.com/viewthread.php?tid=2369...

it tells you how to start the quest until the end:)