Dark Old Demon

Roy's life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
...
It's really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

Custom Made Demon King

With the light of the magic formation shining, Julia, Benia, and Cassandra, who was holding Sareth, appeared in the formation one after another.

As soon as Julia saw Roy, she heaved a sigh of relief. "Darling, it's great that you're fine. You suddenly disappeared when we returned. I was so worried."

"Yeah, I'm fine!" Roy replied. "Perhaps it's because I promoted, I was teleported directly from the Gate of the Abyss to a lower level. I called you over after I found a place to settle down."

"Where is this?" Benia looked around curiously, but she could not see too clearly in the white blizzard.

"My territory!" Roy grinned. "From now on, I am a genuine demon lord!"

Benia understood Roy's meaning when she heard this and immediately said excitedly, "So, this is where the demon lords are, the world of the powerhouses?"

Fat Tiger's Playmate