"Wilhelm's Puppet Theater Domain"

Wilhelm, on the other hand, had Joan to share half the burden of opening his domain and Joan herself was also used to Wilhelm opening his maximum domain every time. 

Wilhelm just gently snapped his fingers, and the next second, the energy from his body spread throughout the battlefield around him, covering the area a mile away! 

The whole battlefield was suddenly shrouded with crimson blood mist, and the mist slowly created thin threads after thread. 

This time, the threads were visible to the naked eye, and the energy fluctuation led to Wilhelm sitting on his mini throne in the air. 

Then, the various crimson threads that didn't bind any celestials quickly knitted on their own, slowly forming a large theater decorated with various frills, bows and other beautiful things. 

The threads 'slowly' did all of this, but it took less than a minute to completely change the entire battlefield inside Wilhelm's domain.