Like Looking at A Mirror

"It's time I ventured into the miasma-filled lands. From what I heard, the Black Demons have their respective tales to tell. This is bound to be an interesting journey." A certain middle-aged man with small patches of white calmly walked through the miasma-filled lands, completely unfazed.

He didn't even glance at the Red Demons that were constantly attacking him, all to no avail. They failed to even scratch him as he continued to walk, undisturbed by their presence, attacks, and sheer numbers. 

At the start, there were just three Red Demons. But upon seeing their struggling expressions, more Red Demons jumped in, attacking the man constantly. Eventually, there were over a hundred Red Demons taking turns to launch their strongest attacks on the man.