Looking at Liu Yingying with sweat on her forehead, Song Yan handed him an evolutionary crystal.

Less than five minutes after she swallowed the evolutionary crystal, Liu Yingying told him that the energy she consumed in her body had been replenished.

Wen Yan heard that Song Yan's heart moved, if Liu Yingying in the battle, constantly taking evolutionary crystals, does that mean that she will become a never-ending attack firepower?

Thinking of this, Song Yan felt it necessary to test her again.

So she was killed by a group of zombies.

After releasing more than 30 fireballs, Song Yan gave her another evolutionary crystal to take.

An hour later.

Song...