First you must meet NPC Frejya in the middle city of dicastes (@go 30)
Talk to her and take the quest
you were told to collect tokens Valkyrie and some zeny
Bring 5x Valkyrie Tokens and 550.000.000Z
She will give you 1x Valkyrie Lucky Egg
Note:
Valkyrie Tokens drop by : Valkyrie Randgris (50%)