Head: Serpentor - modified before I ever got it by Darko, which I got in trade.
Body and arms? Nite Adder?
Legs: Serpentor
Accessories: Chap Mei
This was my Thundercats NJC entry. I called it a "re-imagined" version of Mumm-ra because, as per usual, I didn't try to copy an existing design.
What like about this figure is that he can fairly well represent a mummy/monster even beyond the Thundercats universe. I have a pretty deep line up of Adventure Teamers, Monster Hunters, and other similar characters that can encounter villains such as this regularly.