Before the Universe was the God Knull who lived in darkness until the creation of the 7th cosmos distraught his peace and he decided to wage war on light and all creation. Billions of years ago he went to war with the creators of life, that is the celestials and managed to kill them with the All Black NecroSword, the first protosymbiote. Then he realized he could control the dragons of the abyss and transform them into proto symbiote dragons like Grendel, Big Mother and other Symbiote Dragons like World Killer. He also experimented using the head of the dead celestial as a base of such experimentations and created the Void Knight and Mister E Millions or Billions of years ago. Miter E would survive till modern times but the Void Knight was killed by Ego the Living planet millions of years in the past
With them he also created scores of Old Protosymbiotes which together with the dragons and the others, began to form a hive mind putting the God Knull as the leader. He went out to conquer and destroy the universe with this massive symbiote army.At some point following his establishment of the Symbiote Hive billions of years in the past, the dark elder god Knull constructed an artificial planet from the living abyss to serve as the throneworld for his empire. Ashamed of their dark past, the symbiotes of Klyntar desired to spread and maintain peace throughout the Cosmos by seeking out worthy hosts from various species in order to create an organization of noble warriors, the Agents of the Cosmos.However, many of the symbiotes were bonded to unworthy hosts, "corrupting" them with hatred, rage, and ravenous predatory hunger. These "corrupted" symbiotes were cast out of the Symbiotes hive-mind which took to forcibly cleansing those it captured and executing those who resisted or relapsed.
The we find out that the corrupted symbiotes call also lay eggs for future generations and one such Egg bore the 998th Generation symbiote known as Venom. And with this particular Klyntar, we will see its family tree, which includes the clones, the forcibly generated offsprings and also its natural offsprings and their children as well.So here are the clones, The symbiote that would be later known as the Mania symbiote was a clone of the Venom symbiote created by the Ararat Corporation from a piece of its tongue, intended to facilitate Bob's goal of exterminating all life on Earth.When Eddie Brock separated from the Venom symbiote, traces of it were left in his body. Later, suffering from cancer, Mr. Negative, used his powers to cure him. In the process, Li accidentally infused the remnants of the symbiote in Eddie's bloodstream with his power and fused them to his white blood cells, creating a Anti venom.Now we come to the 999th generation of these symbiotes starting with the ones created forcibly out of venom by the life foundation, which gave rise to five offsprings namely, Agony, Phage, Riot, Lasher and Scream. It is here that we get to know that the offsprings of a particular symbiote is more powerful than the parent and more resilient as well. Although Riot in the movie was not stated as a child of venom but in canon, he is and he along with the other four can combine to become the hybrud symbiote and together even more enhance their collective powers.Now we come to the natural children of Venom starting with, Carnage.
The original Carnage symbiote was the first offspring of the Venom symbiote, spawned when it broke Eddie Brock out of prison or in the movie when Cletus Cassidy bit eddie brock and got infected by a piece of venom. The newborn symbiote bonded to serial killer , merging with his blood to become nigh-inseparable from him, and Carnage was born.The youngest child of Venom is the Sleeper symbiote which was very different in comparison to others. This particular symbiote was much different in appearance and did not take on some of the characteristics of the Venom symbiote, such as the trademark embellished white eyes. It was also a smug, yet loyal symbiote who protected its hosts, even if it was prone to brutality from time to time.So Now, from Carnage we have three offspirngs namely Toxin, Scorn and Raze. Born from Carnage as the 1000th symbiote in its lineage,
"Toxin" was feared to be the strongest and most dangerous of their race by both Carnage and Venom besides Knull.scorn is a purple Symbiote and the first cyborg of its species. It came into existence when a piece its parent, the Carnage Symbiote, was combined with a mechcanical prothesis. Since its birth was linked robotically, the symbiote is an machine/symbiote hybrid, being able to fuse itself with different kind of weapons. The Raze Symbiote was spawned by Carnage and bonded with former FBI special agent Claire Dixon as part of a ritual involving the Darkhold. The symbiote appeared to have died when it was absorbed it into another symbiote to fight Carnage and the eldritch god Chthon.