Lord of Caldera - Chapter 307 - Ruthless

The doomsday fell upon the earth when a dragon coffin sealed under a snow mountain for ages shifted, and the civilization of gods and devils began. The whole universe turned into a fantastic new world where everyone could rise to the top through cultivation. A lucky young boy seized the opportunity, and started his journey to be an overlord in cultivation.

- Description from Novelupdates

Humanity has conquered half the galaxy and the Age of Mechs reigns supreme!Ves Larkinson lacked the genetic aptitude to become a famed mech pilot. Fighting against his fate, he studied mech design in order to express his love for mechs as a builder instead of a soldier.When Ves graduated from college, he returned to a new but empty boutique. Left with a small, newly founded mech workshop that his father painstakingly built with a mountain of debt, Ves somehow needs to make ends meet with the bank breathing down his neck.In the midst of his despair, he found salvation from another legacy his father had left."Welcome to the Mech Designer System. Please design your new mech."--Join The Mech Touch's unofficial Discord server: https://discord.gg/APB5KCU

An unexpected journey took a group of university students into a secret room from which, upon returning, they began to disappear one by one. In order to unravel the mystery, they joined forces, traversing heaven and earth, diving deep into seas, crossing the farthest corners of the world, and even daring to time travel, only to find that behind each puzzle lay yet another.

Cao Xin, a young man on earth, died in a car accident, traveled to a troubled world where supplies were scarce, and obtained a “Bronze Immortal Gate”…

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- Description from novelbuddy