When I did that mummification series:
http://www.furaffinity.net/view/1440727/
http://www.furaffinity.net/view/1440745/
http://www.furaffinity.net/view/1440773/
http://www.furaffinity.net/view/1440790/
http://www.furaffinity.net/view/1440819/
http://www.furaffinity.net/view/1440873/
I DID also draw the gun, and anubis to go with it. I just never finished it.

Till now.

Here we have Anubis, God of the Underworld, wielding the Mummygun and inviting you to start some shit... he's prepared.
Only he can fire the gun repeatedly, as it is magical and draws its energy from the user. If a normal person were to try and use id, they'd only get off one or two shots, max before it drained them completely and they had to lie down and rest.
If you already have some magical powers you can get a little more use out of it. But Anubis here has unlimited mummification magic and is not drained by it. You don't fuck with Anubis