Chapter 716: Icy Spirit City

Zhao Fu went to the Wyvern Den and fused the Spawn Rate Crystal into it. Countless rays of light spread out, and the Den gradually became larger until it was four times as big as before. It gave off an incredibly powerful aura. Now, it could spawn five Wyverns every two days.

The Den's level was now a Basic City, and if it could level up to a Great City, it would be able to spawn Wyverns every day. With the Spawn Rate Crystal's effects, it would be able to spawn five Wyverns every day.

Leveling up the Den required the Den's creatures to obtain EXP themselves. As such, Zhao Fu decided to allow some Wyverns to roam free in order to help the Den quickly level up. That way, they would be able to spawn more and more Wyverns; it went without saying just how powerful a Wyvern army would be.