Venom

Venom is a symbiote that landed on earth by a meteorite from an unknown planet. The symbiote landed while Peter Parker and Mary Jane Watson were on a date with each other, and hitched a ride through Parker's motorcycle. Eventually, one night, the symbiote bonded to Parker when he was inside his apartment. The symbiote bonded with his suit, with Peter's personality being amplified. Eventually, after discovering the true nature of the symbiote, he removed it inside of the church, successfully ridding himself of the symbiote. However, Eddie Brock, who was also at the church, saw Peter removing the symbiote, and as he was present, he was eventually chosen to be Venom's host.