The character is a sentient alien
Eddie BrockVenom. Bonding with an unearthly symbiote, Eddie Brock is given amazing powers and an unstable psyche.
Previous stories have established that the Venom symbiote is a member of an alien race called the Klyntar.
There are more than 40 known symbiotes in the Marvel Universe. The first and most well-known symbiote is Venom, who originally attached itself to Spider-Man during the 1985 Secret Wars miniseries.
The Venom symbiote's first human host was Spider-Man himself, who eventually discovered its true nefarious nature and separated himself from the creature in The Amazing Spider-Man #258 (November 1984)—with a brief rejoining five months later in Web of Spider-Man #1.
Symbiotes like Venom are immensely powerful, possessed of great strength and endurance, but they also have two extremely common weaknesses: fire and sound. Numerous foes have used these to best Venom and other symbiotes, and Peter Parker even originally repelled the symbiote suit by exposing it to a tolling bell.
Knull, also known as the God of the Symbiotes, is one of the overarching antagonists in the Marvel Comics universe, serving as the main antagonist of the Venom comic book series.
As you may recall from the first Venom movie, the symbiote was unable to bond with numerous people and left each of its test hosts dead. It wasn't until Venom formed a special bond with Eddie that both the host and symbiote were able to survive.
Venom later decided to absorb the Carnage symbiote "for good", during which Kasady retained the Carnage persona by costuming himself in red paint and continuing his killing sprees (albeit as a powerless human).
Carnage can shape his limbs as solid weapons and even travel phone wires to attack people on the other side of the line. For many years, Carnage was Venom's greatest enemy, with the anti-hero always having a tough time taking the red symbiote down.
The only truly foolproof weapon against Venom and his fellow symbiotes is the touch of Anti-Venom. Anti-Venom was born when a cancer-ridden Eddie Brock was healed by Mister Negative.
Why was venom afraid of carnage?
Combining with the nearby Brock, the symbiote shared his hatred for Spider-Man, as well as mentally sharing with Brock its former host's secret identity of Peter Parker. From there, the two would be known as Venom, seeking violent retribution against the man who had wronged both of them.
The creature belongs to a race of amorphous extraterrestrial parasites known as the Symbiotes and is regarded as Venom's symbiotic brother. His physical features include white "skin", a black face, and spider symbol across his chest. Eddie Brock as Anti-Venom.
While in prison, Venom produces an offspring named Carnage. (He reproduces asexually, in case you were wondering.)
According to symbiote biology it would be The All-Black, also known as The Necrosword. Due to being the first symbiote knull ever made, it's already weak as it is, only granting the basic suit and itself as a weapon.
Trivia. Only the symbiote half of Venom qualifies as Pure Evil since even as a villain, Eddie is treated both with sympathy and as a poor victim of the symbiote's influence.
Who would win in a fight between carnage and riot? Carnage does have more abilities, but was like a rampaging kid and Venom ate it to kill it. Riot was cunning, and was even able to rip Venom from Brock and would have eaten him if Brock didn't rebond with it.
Venom is a villain in Marvel's Spiderman. He also known as Eddie Brock. He hates Spiderman because he thinks he is the cause of all the bad luck in his life. Venom is bigger and stronger then Spiderman.
Carnage is Venom's offspring and with Klyntar/Symbiotes their offsprings are more powerful than the parent. But Venom bonded himself to Eddie's body down to the cellular level. That way if Eddie gets hurt or something Venom can essentially heal Eddie's injures faster.
During 1984's SECRET WARS, Deadpool was introduced to an alien symbiote who went on to become Spider-Man's black costume and, eventually, Venom.
Deadpool was bonded to the Venom Symbiote in the alternate reality of Earth-90211 as seen in : Venom/Deadpool: What If? #1 and begins to become known as Venompool.
In short, Deadpool is seemingly indirectly responsible for creating Venom - or at least, for making him crazy and violent.