Symbiote

Back story 

Symbiotes are alien organisms that bond to a living host in order to survive. When they bond to a host, they generally do so by forming a living costume or skin around the individual that can be retracted through the subject's skin. The symbiote and host share an empathic bond with each other, allowing the symbiote to react to the host's thoughts and emotions. Symbiotes feed off of the adrenal gland of their host, and because of this crave behaviors that will cause an adrenaline rush in the host creature. As a result of this the host will often partake in risky and violent behavior, and have a high mortality rate. A symbiote will generally have several hosts over their lifetime.

It has recently been revealed that several years ago the now-deceased Emperor D'Ken of the Shi'ar Empire and his forces discovered a member of a unique strand of the Symbiote species. Unlike its cousins this gray monstrosity consumed brains for nourishment rather than adrenaline and prefers taking control of multiple hosts simultaneously so it can consume more brains faster.

Most Notable Symbiotes

• Venom - The Venom symbiote craved to bond with one host creature permanently rather than killing its host. Because of its views Venom was branded as a heretic by the rest of his species and was imprisoned. Spider-Man originally encountered the Venom symbiote during the Secret Wars, but removed it with the help of Mr. Fantastic when he learned that it was controlling his actions and attempting to bond with him permanently. Eddie Brock was the second and most memorable to wear the Venom symbiote. Brock had a strong hatred of Spider-Man, and as Venom became one of Spider-Man's greatest enemies. Currently Mac Gargan, the former Scorpion has bonded with the symbiote and taken up the Venom mantle.
• Carnage - Carnage is the offspring of Venom. Carnage bonded with the insane Cletus Cassady, and is a dangerous enemy to both Spider-Man and Venom. Carnage can use his symbiote on his body to make a weapon, he can make his symbiote rock hard and when he flings some symbiote off, the symbiote can simply fall away in a few minutes.
• Scream - Is the daughter of Venom and was one of the Life Foundation Symbiotes. Her hosts name is Donna Diego. She is also the one who killed her siblings hosts with a sonic knife. Donna devoted herself to kill all of the other symbiotes cause she thought that they were evil like herself. Venom seemed to be the main target, since she fought him on several occasions. Until recently she regrets her villanous ways and began to help the other symbiotes hosts by teaching them how to deal with there symbiotic half.
• Agony - Child of Venom
  
• Lasher - Child of Venom
  
• Phage - Child of Venom
  
• Riot - Child of Venom
  
• Toxin - The Toxin symbiote was the offspring of Carnage. Carnage tried to kill Toxin soon after spawning him out of fear of Toxin growing more powerful than both Venom and Carnage combined. Toxin bonded with police officer Patrick Mulligan, who is currently struggling to remain a force of good with his new found abilities. Now, he learns how to controll his powers and regard the symbiote as innocent. Sometimes the symbiote give him ideas that help him out. Now, he is staying together with Gina and the symbiote.
• Hybrid - Is the combined form of Agony, Phage, Lasher,and Riot. They merged with Scott Washington and became Hybrid.
• Dreadface - An alien symbiote of the same race as the Venom symbiote that appeared in two issues of the Fantastic Four volume one. It was imprisoned upon the worship of Devos the Devastator and accidentally set free by the Fantastic Four when they crash-landed the ship on a remote island. While Reed and Sue take off in a jet to find help, Ben and Johnny are attacked by Dreadface. He is killed when Ben sets off an explosion, destroying the symbiote. Of interest is the fact that while Dreadface showed a weakness to Johny's flames, when he had taken Johny as a host he gained the Torch's immunity to his own fire. This appeared to occur due to Dreadface pulling the symbiote back from the parts of Torch's body that were aflame, while retaining control over his mind. Dreadface's appearance is very similar to that of Venom's incarnation in the year 2099, though lacking the spider symbol and the monstrous tongue. It is Believed deceased but appeared in cameo in Fantastic Four Foes #1.
• Anti-Venom - Even though Eddie Brock shed the symbiote Venom suit, fragmented cells of the alien still reside in his blood stream. Mr. Negative's energy bonds these particles to Eddie's white blood cells, creating an "Anti-Venom" suit. This new "symbiote" is toxic to the original Venom parasite. This new symbiote has no weakness to fire or sound like the other symbiotes.
• Angelo Fortunato - The son of Don Fortunato, he was the second person to become Venom, but only for a short time.
• Captain America's Symbiote - Captain America with the Symbiote suit in the World of Symbiote
• Wolverine's Symbiote - Wolverine with the Symbiote Suit in the Weapon X
• Deadpool's Symbiote - Deadpool with the Symbiote Suit in the Weapon X
  
• George - One of the last symbiotes left from the invasion of the symbiotes, eventually eaten By Xenophage.
• ZZZXX - Is a unique member of Symbiote species who feeds on brains instead of adrenaline like his cousins. He was captured by Emperor D'Ken several years earlier but before D'Ken had a chance to study ZZZXX he was killed by Vulcan. ZZZXX is considered to be one of the five most dangerous criminals the Shi'ar Empire ever captured. He was recently given a male Shi'ar host to feed on while he serves Vulcan as a member of the new Shi'ar Imperial Guard, though after a brief encounter with Lilandra Neramani he has become obssessed with making her his host.
• Variant - New kind of symbiote, it feeds from host's bliss. It grants ability to fly, to generate electricity, super strength and durability and it does not fear fire. It was bonded with Maximillian Trent, but after he died it moved on to the man's daughter Mavis Trent. It called itself Variant, and told her, that it's more evolved version of symbiotes.
  
•  Carnage Surfer
• Bizarnage
  

Powers

• Superhuman Strength
• Superhuman Speed
• Superhuman Agility
• Healing
• Genetic Memory: The host can bring back memories of former hosts of the symbiote
• Tracking: Generally in the form of tracking other symbiotes
• Altering Appearance: They posses the ability to change their color as well as their shape. Toxin has exhibited the ability to also make certain portions of his body translucent or transparent (particularly at the eyes
• Tendrils: Flexible appendages that posses great amounts of strength equal to that of an average man.
• Shape Shifting: Carnage has been known to create blades and other weapons on his limbs or change his very appearance or simply camouflage himself to his surroundings.
• Stealth: After being bonded to Spider-Man for so long , Venom also posses the ability to mask itself from Spider-Man's Senses.

Weaknesses

Even though each symbiote generation gets a little stronger their main weaknesses are sound and heat. Though some are more immune to the effects of said weaknesses, intense amounts will usually take a toll

Alternate Realities

On Earth-9997 (Earth-X the Venom symbiote has bonded with an alternate version of May Parker - Spider-Girl. She is in control over it.

Earth-982

On Earth-982 (MC2) the Venom symbiote has bonded with Normie Osborn, grandson of Green Goblin. Much later the symbiote sacrificed itself to save Spider-Girl's life.

The Carnage symbiote was accidentally released by Spider-Girl from it's containment at SHIELD. It bonded to May's friend Moose Mansfield.

Earth-15

On Earth-15 the Carnage symbiote bonded with Spider-Man. His name is the Spider and is the member of the reality traveling Weapon X. He was killed by Firestar and was buried in his native universe.

Earth-928

On Earth-928 (2099 the Venom symbiote has bonded with Kron Stone, brother of Spider-Man 2099. It later bonded with Namor 2099.

Earth-9811

On Earth-9811 the Venom symbiote has been bonded with Spider-Man for so long that only his skeleton remains.

Earth-985

In this reality the Carnage symbiote bonded with Silver Surfer. The Surfer fought Spider-Man, the Avengers and Firestar. When she managed to injure the symbiote, he gained enough control of himself and realize what is happening. When he knew that the Carnage symbiote will likely to control him again, He flew towards the sun, destroying them both.

What If? Spider-Man The Other

Peter Parker didn't accept the spider in him and remained trapped inside the cocoon under the bridge. Venom left Mac Gargan and joined with Parker, this union was something new and they called themself Poison.