Thrasher's Tail

Thrasher's Tail is, as the name implies, the tail of Thrasher, the evil, named alligator that spawns in the Blighted Grove.

It is used for a Quest, and has no other known use.

After the launch of the Mondain's Legacy expansion, the Tail could be used to make a rare cloth color, known as "Necromancer Gray."

However, this was a bug, and was fixed.

Also see Coil's Fang and Abcess's Tail.