Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 524.1 - 525:

Layton awoke in a new world, what he thought was just a normal medieval world with wizards turned out to be much more.

Wizards, Magic, gods, Martial arts,numerous worlds, and grand civilizations that run through numerous multiverse in the void, a place filled with countless planes and numerous planar universes.

On such a grand stage nothing is truly impossible. Follow on the epic journey as Layton rises from a mortal on a weak plane as he follows the wizard path to the peak and beyond.

One day, Zhang Fan, a poor medical student, receives a medical system from the future. This turns him into a new shining star in the medical field. Along the way, he must face medical corruption, competition, and infighting from other doctors, and even find time for a love life as he strives for the top of the medical field!

- Description from Novelupdates

It is the story of a young man who died and was reborn as a level 1 skeleton soldier in an underground world. Follow our protagonist as he struggles to survive in a foreign, RPG-like setting surrounded by danger and monsters. Watch as he levels up and overcomes all obstacles through sheer perseverance and wit, rising to prominence