William gave the Cosmic Entity's incarnation a good thrashing.
Just simple, straightforward punches to the flesh.
But the Cosmic Entity's incarnation didn't resist at all, acting like a punching bag for William to beat up.
"Boring." With a kick, William sent the Cosmic Entity's incarnation flying and finally stopped.
Before this, William was somewhat curious about the Cosmic Entity.
He even thought that the Cosmic Entity might be like him, simply powerful to a certain degree.
Like a main god of a parallel dimension setting some world laws.
Now it seems the Cosmic Entity exists in this world in a form of consciousness.
Or rather, the Cosmic Entity does have a physical form but chose not to fight William, hence the elaborate ruse.
The Cosmic Entity must have also concluded that William wouldn't directly kill it...