From the Silifi of Crimson Stars quest introduced in the The Slumbering Giant event.

Plate Armoredillo Spine
Value: 60p
220 Burden Units
This spine looks as if it could function as the blade of an axe.

Notes

You give Trophy Smith Plate Armoredillo Spine.
Trophy Smith tells you, "Oh wonderful, a new spine! Maybe I can .. No .. Well .. Hmm. I'll just hold onto it for now."
You've earned 8,000 experience.
Trophy Smith gives you 20 Potions of Healing.
Trophy Smith tells you, "Come again."