Nah, that was an execution for if he was in For Honor
I got an idea for a fatality, it is very brutal tho
Harbinger forces the enemy to their knees, before opening their mouth, and shoving in the handle. He forces it down their body as much as he can, the head of the hammer being the only thing sticking out
He then thrusts his hand in his intestines, grabbing the handle, and using his other hand to grab his head, while he rips out the hammer, which also bursts open the entire front half of their body