Arms

[Pergentile]

Death Dancer
Tome of Magic
This is not the creature you are looking for...

 

[Jhaelen]

What about the Hook Horror?

Yup, that's what I thought of, too. Also, there's the Bone Claw (MM3).

 

[Rhun]

The Bone Claw is cool, I was just thinking that the Hook Horror is the iconic creature that fits the description. I believe it is in MMII for 3.x.

 

[Vikarr]

It is in the MMII