Spinner's shed fang
Cast off in the ordinary way of growing. That there is room to grow larger is the worrying part.
Vendor trash. Nothing in the game wants it: no recipe, no enchant, nothing to wear. Stacks in one inventory slot. Vendors pay 660 coins for it.
What drops it
The Old Spinner
1 in 5
Rolled on its own rather than from the loot table, so it takes nothing away from anything else that falls off it.
What it trades for
No trades in the last 30 days.