The Leviathan Full Plate quest is a short quest west of Frore. Kill the Leviathan (a large turtle), take her egg, and trade it for a set of Full Plate armor.
Requirements
Access to the area southwest of Frore's west gate
Level 15 minimum
A party capable of killing the Leviathan
Walkthrough
Leave through the west gate of Frore and head southwest.
Follow the wall until you find an opening heading south — this is the Leviathan's lair.
Kill the Leviathan with your party. She is a large turtle creature.
Search her corpse and take her Egg (the egg ties to the player who picks it up).
Bring the egg to the NPC holding Full Plate armor in a small building east of Frore.
Hold the egg in your right hand, click on his name, then click the talk button.