700 The Last 72 Hours

After Primordial Sword Immortal was sent flying, he immediately flew into the air and slashed out rows of sword beams in all directions.

However, other than Primordial Sword Immortal and his sword beams, Zhou Wen and An Sheng saw nothing.

"An invisible Companion Beast?" Zhou Wen and An Sheng could see the surprise in each other's eyes.

Invisibility Companion Beasts were rare. Zhou Wen had an Invisibility Cloak Companion Egg, but it was a problematic Companion Egg. He hadn't managed to hatch it yet.

Apart from that, he had also heard of some Companion Beasts that could be invisible. However, they weren't absolutely invisible.

For example, a Companion Beast named Chameleon could fuse with the environment through Chameleon Transformation and reach the goal of invisibility.

However, this kind of invisibility was basically useless against top-notch experts.