Venom

Venom is an Iconic Supervillian appearing in Marvel Online Universe. Venom is a sentient alien symbiote with an amorphous, liquid-like form, who survives by bonding with a host, usually human. This dual-life form receives enhanced powers and usually refers to itself as "Venom". The symbiote went on to merge with Daily Bugle Investigative Journalist Eddie Brock, its current and most infamous host, with whom it first became Venom. As Venom, Brock has enhanced physical abilities similar to Spider-Man such as Superhuman strength, speed, agility, and durability, ability to cling to most surfaces, and organic webbing, along with limited shapeshifting and camouflage, symbiote's autonomous defense capabilities, undetectable by Spider-Man's "Spider-sense"

The Eddie Brock incarnation of Venom is among Spider-Man's most famous rogues, and is regarded by many as one of a dark reflection of the hero and one of his three prominent archenemies along with the Green Goblin and Doctor Octopus.