The Immortal Hades System of All Heavens and Myriad Realms

Tang Yu understood a little more in detail.

The symbiotic contract actually has a disadvantage, that is, the lives of both parties are shared after signing the contract. If one party is injured, the other party will suffer half of the damage. If one party dies, the other party will also die.

Tang Yu is not too worried about this, because the lifespan of the weakest wild beasts is extremely terrifying, even if the little doctor works hard, the final lifespan may not be as high as that of the yin-yang bird.

Tang Yu is not a person who likes to procrastinate, so he immediately entered the ninth floor of the Tower of Ten Thousand Beasts with his consciousness.

The Tower of Ten Thousand Beasts has nine floors in total, and the wild and strange beasts are on the ninth floor. Tang Yu's spiritual consciousness swept over the ninth floor, and quickly found the group of Yin-Yang Birds, and then pulled out a Yin-Yang Bird from inside.

The next moment, a giant bird with a height of more than ten meters appeared in front of Tang Yu and Xiao Yixian. The feathers on this bird were black and white, and it looked a bit evil.

The sudden appearance of the yin-yang bird frightened the little doctor, and he grabbed Tang Yu's sleeves subconsciously.

Tang Yu touched the little head of the little fairy doctor and said, "Don't be afraid, this is a yin-yang bird, and it will be your most important partner from now on."

The little fairy doctor looked at Tang Yu suspiciously.

Tang Yu explained: "The yin and yang bird is the overlord of the poison, you can sign a symbiotic contract with it, after the contract is completed, you can learn the poison control technique of the yin and yang bird, and you can use it freely on your doom poison body in the future.

But after the conclusion of the contract, you are one body. If one of you is injured, the other will share half of the damage, and if one of you dies, the other will die too. So, girl, are you willing to conclude a symbiotic contract with the yin and yang bird? "

The little fairy doctor nodded with unusually firm eyes. She deeply knew how terrible her doom poison body was, and she always wanted to solve this problem, no matter what the price was.

Tang Yu smiled, although the Yin Yang Bird is not strong among the wild beasts, but in the world of Fighting the Sky, its strength is comparable to the master, and the little doctor is definitely making a lot of money.

Tang Yu drew the symbiosis contract formation that he learned from the system on the ground, and then let Yin Yangniao and Little Doctor Immortal stand in the middle of the formation.

The Little Immortal Doctor had never practiced before, so he had no battle qi. In the end, Tang Yu used his own battle qi to activate the formation.

The complex formation on the ground began to emit white light, which became more and more dazzling until it completely enveloped the little doctor and the Yin-Yang bird.

At this moment, the worlds of Little Doctor Fairy and Yin-Yang Bird turned white, only each other was left in their world, and Little Doctor Fairy and Yin-Yang Bird looked at each other.

Suddenly, the little doctor stretched out his right index finger subconsciously, and the yin-yang bird seemed to sense a summoning force, and stretched out his right hand, and the two right hands touched together, and the next moment the white world collapsed.

The little fairy doctor closed her eyes tightly, and a black and white intersecting bird-shaped pattern slowly appeared on her forehead, and then the yin-yang bird directly turned into a white light and a black light and shot into the little doctor's forehead.

The bird-shaped pattern immediately glowed, and the light flickered for a while before it fell into peace. At this time, the little fairy doctor also opened his eyes.

Tang Yu looked at the little fairy doctor's eyes. Although it was only a very slight change, Tang Yu noticed it at a glance. There was a bird-shaped pattern in the little doctor fairy's eyes, which was very similar to the one on her forehead.