"And keep your foot off that blasted samoflange!"

It’s Panthro of the Thundercats!

Authorship credit goes to Halucid by implicit request.

It’s MummRa, the evil mummy from Thundercats.  This is the not so charged, feeble-yet-still-nefarious MummRa.

MummRa, when empowered with the spirit of the ancients, takes on this supercharged form to take on the Thundercats.

Thunder! Thunder!! Thundercats! Hooooooo!

.. It’s Lion-O.