In the Battle of Doom, after the research of top scientists from many countries, it was decided to name this alien monster after a dragon in the ancient legend of the Yulong Kingdom and named it Yu.

虺 (hui) has extremely high athletic ability, which can be roughly divided into three types, corresponding to the sky, the ground and the sea; It is generally referred to as flying species, terrestrial species, and marine species.

Each big species is divided into a variety of species, but there are also strong and weak, they also have a hierarchy, the weakest strange species, the more advanced shell species, and then the advanced endangered species, the highest level is called the collar, and the general description of it is mostly called the large species + level.

Although the odd species is the weakest, it is only relative to the dragon, and the athletic ability (speed, strength, reaction, explosion) of a strange species is stronger than the world's strongest exoskeleton armor recognized as the world's strongest arthurbrilliant during the Doomsday War, and only the big data connection processing of background data can barely kill a strange species.

Its appearance is immune to most attacks, and the effects of ordinary bullets, grenades, and explosives on it are completely lethal, and at most can only seriously injure it.

The second-level shell species has evolved a special shell, and the effect of ordinary weapons on it has become minimal, greatly improving the survivability, and at the stage of the shell species, the vitality has been significantly improved, even if it is on the verge of serious injury, but as long as it takes two months of rest, it can fully recover.

The number of strange species is the largest, and the higher the level, the rarer the number. When the insect reaches the stage of endangerment, its wisdom will be significantly improved, and its wisdom will be about the level of a child of five or six years old, and its self-healing ability will be greatly improved, and the same injury can be completely repaired in a month.

When the species reaches the stage of endangerment, there will be a very careful classification, and there are three groups of endangered species known to mankind, the mad race, the disease tribe, and the hermit tribe.

The corresponding abilities are infinite, extremely fast, and stealthy. Most of the Li clan are earthly species, more than half of the disease clan are flying species, and the hermit clan is the most mysterious race, with three major species in its members.

The ability of strength and illness is not the most terrifying, the most terrifying is the hermit, who can quietly kill people invisibly, this clan seems to enjoy fear very much, and likes to play with opponents very much, and will torture opponents carefully.

The number of collars is the least, but it is also the most terrifying. A collar breed dominates tens of thousands of strange species and thousands of shell species, and hundreds of endangered species; is the true master of the battle.

Humans have never succeeded in killing the Leader Seed once, the Humans only know about his existence, the only picture is the Dawn Goddess of the Dawn reconnaissance machine Aurora in the Milley Kingdom accidentally took it during the mission, but it was destroyed when it was about to leave, fortunately a very blurry picture was transmitted back, only the figure can be seen, and the human race is almost unknown to the Leader Species.

This is even more frightening to mankind, the Aurora reconnaissance aircraft is the latest hypersonic strategic reconnaissance aircraft, which uses a pulse-detonation engine and has a flight capability of up to Mach 7, but it was shot down; It shows that the speed of the Yu is far faster than the fastest reconnaissance aircraft of mankind; And it can withstand the earthquake generated in the vicinity when the Aurora reconnaissance aircraft is operating at high power.

With the end of the Doomsday War, humanity has lost most of its combat capabilities. Humans can only build high walls to resist the invasion of monsters, and the outer layer of the city wall is covered with an energy shield of charged particle fields, but due to the high cost of construction, coupled with the collapse of the economy of many human countries, the global economy is sluggish, and a large amount of military spending in the Doomsday War.

As a last resort, it is necessary to merge countries and immigrate. The whole world is in shambles, countless wives and families are broken up, and the remaining human beings can only hug each other for warmth in a cold world of death and blood.