World's Richest Man: I Leaped Across Time - Chapter 89: Coordinated Attack II

Yuki, a high school junior, dies heroically saving a stranger and is reincarnated in a fantasy world, where he discovers an extraordinary and unrivaled power.

Shao Ci was bound to the ‘Befriending the Most Powerful Person’ system. After crossing through, only then did he discovered that as long as a more powerful person emerge, this unscrupulous system will immediately change the ‘capture’ target….

- Description from Novelupdates

Riven's life turns upside down when Elysium's Multiverse absorbs planet Earth. On the fringes of a newly growing galaxy where magic and fantasy are both very real, the inhabitants of three merged worlds must find a way to survive the trials Elysium sets out for them. Riven finds himself thrust into a whirlwind of chaotic events just trying to make it out in one piece, learning how to craft the dark arts to do his bidding as he strives to keep his loved ones safe.But the powers of this new multiverse have other plans for Riven's tiny planet, and Elysium's worldwide trials are just the beginning.*A mixture of brutal violence, the darker aspects of humanity, and comedy. Centered around a blood mage / warlock and his demonic summons. This story is full of gory fight scenes, you have been warned.**Inspired by 'Defiance of the Fall', 'Primal Hunter', 'The Legend of Randidly Ghosthound', and 'Infinite Realm' series. I hope I do them justice.*