章 1765: Maintenance

Anyway, they were still trapped on the first floor, and the number of zombie clones was already saturated.

He decided not to level up for the time being. He could save a large number of zombie clones for emergencies.

There were only three levels left before he reached Level 40!

Based on his past experience, he would most likely require a Tier 3 mutation crystal for his next upgrade.

At least for now, he had yet to find a way to obtain the Tier 3 mutation crystal.

Perhaps he would have to farm a commander-level creature to get it.

It was not difficult.

Fang Heng remembered that he had seen the Black Castle using commander-level mechanically modified mutated creatures to attack the federal camp.

At that time, he had also observed it.

The commander-level mutated beast was very strong, but it was not impossible to defeat it.