Warhammer: From the Devouring C'tan Fragments

The Empire has gone through thousands of years of turbulence in this cruel universe. The Empire seems to be shaky, but it stands firm. The Empire is like a dilapidated house. Whenever someone wants to kick it and make the house collapse prematurely, you will find countless strong men rushing out of the house and surrounding you in a circle to kick you. A mortal from a purely physical universe travels to the Warhammer universe, looking at the decadent Empire, and can't help but want to replace it. How big a wave will it set off? ...