Supreme Magus (Web Novel) - Chapter 3532: Surprise Party (Part 1)

Originally from the slums, Adam was chosen as a candidate for an experiment to ignite the Spark - an entity that gives superpowers. However, he failed and was thrown into the Dead Lands - the place the world became after the fall of the Last Star, beginning a new era for mankind, dangerous and unexpected. He faced against monsters and dangerous anomalies, sometimes creating artifacts - the miracle of this world.Killing his first monster in deadly combat, Adam became a Phantom - one who could evolve, endlessly moving toward power.Follow Adam on his journey, from fighting monsters and exploring Dead Lands to endless evolution!

A continuation from where High School DxD Volume 25 left off.

At some point in the 21st century, the Christian God stopped listening to the prayers of humanity. Monsters with colossal strength and endurance began to emerge and humanity entered its darkest period.