Chapter 417: The Land of Thunderstorms 1

In three days, after consuming hundreds of spiritual stones, Wu Wei successfully and unreasonably raised the strength of the lightning rat to a terrifying level.

However, at this point, Wu Wei had to take the next step.

He had to solve the problem that the fifth lightning rat's strength had soared, and the Origin could not accommodate it.

There were actually two ways to solve this situation. One was to advance, and the other was to upgrade the quality.

The first type was more conventional, but it was not suitable for the lightning rat because its current strength had grown to a super-standard level. Once it advanced, its strength would definitely increase further.

At that time, the Origin would definitely not be able to withstand it. Wu Wei did not want Old Five to collect its corpse after he advanced.

Therefore, Wu Wei could only choose to upgrade his grade or evolve.