(information taken from marvunapp)
(Sleepwalker #3 (fb) - Cobweb has stalked the Mindscape since before recorded time, preying on innocent, defenceless minds. Sleepwalker opposed him many times, banishing him to the farthest reaches of the Mindscape, but each time Cobweb returned.
(Sleepwalker#3 (fb) -BTS) - Cobweb located the mind of Rick Sheridan, knowing Sleepwalker would attempt to prevent any attack upon that mind. He hid in the back ground, and extended a duplicate of himself to lure Sleepwalker into a trap.
(Sleepwalker#3 (fb) - Sleepwalker attacked and became entangled in Cobweb's trap. Cobweb kicked Sleepwalker into Rick's mind.
(Sleepwalker#22 (fb) -BTS) - While Sleepwalker was trapped in Rick Sheridan's mind, Cobweb secretly observed him from afar.
(Sleepwalker#32 (fb) - BTS) - When Sleepwalker lost his Imaginator device, Cobweb hid it within himself.
(Sleepwalker#33 (fb) - BTS) - Cobweb planned to use the Mindspawn to spread madness on Earth by having them pose as an invasion force, and granted them the physical appearance and powers they would need to pose as members of the Sleepwalkers race. Ultimately, Cobweb hoped that once madness was widespread amongst the Earth's population his power would become absolute.
(Sleepwalker#19) - Cobweb found the Chain Gang, and tortured them until they were ready to do his bidding. He ordered them to destroy Sleepwalker by killing his human host, Rick Sheridan, and sent them to Earth via the mind of Rambo, Rick's pet dog.
(Sleepwalker#20) - The Chain Gang failed in their mission when Rambo was disturbed by Rick's landlady, and they returned to the Mindscape. Cobweb punished them for their failure, and threatened to kill them. Uplink complained that the failure of the mission was down to Cobweb placing them in the mind of a dog to begin with. Cobweb gave them a second chance and led them to the mind of Alyssa Conover. This attracted the attention of another Sleepwalker, but the Chain Gang defeated him and left for Earth via Alyssa's mind.
(Sleepwalker#22) - Rick Sheridan, who had exchanged minds with Sleepwalker, had been attacked and mortally wounded by Hobgoblin. As Rick lay dying inside of Sleepwalkers mind, Cobweb reached in and pulled him into the Mindscape. Cobweb appeared to be shocked to discover that it was Rick, and not the real Sleepwalker see comments. Rick explained that their minds had been switched, and that he was dying as a result of a neck wound.
(Sleepwalker#23 (fb) - BTS) - Cobweb cast an illusion, making it appear that Rick's neck had been removed completely.
(Sleepwalker#22) - Cobweb watched and laughed as Rick fell further into the Mindscape.
(Sleepwalker#23) - Rick was led back to Cobweb by a group of Mindspawn. Cobweb attacked them with the aid of the Bad Ideas, killing three of the Mindspawn and made the other two disappear, before returning Rick to Sleepwalkers mind.
(Sleepwalker#25) - Cobweb appeared to Rick Sheridan, whose mind was now back in his own body, in his dreams. He prompted Rick to recall what he had overheard regarding the Mindspawn (whom Rick assumed to be Sleepwalkers) and their plans of invasion.
(Sleepwalker#33 (fb) - BTS) - Cobweb soon learned that the Mindspawns direct approach had its drawbacks, so instead gave them the ability to take over peoples minds.
(Sleepwalker#31) - Cobweb had his minions take Rick to his lair.
(Sleepwalker#33 (fb) - BTS) - Cobweb began re-shaping Rick's Earth-born essence to his own design, hoping for him to serve as a perfect inter-dimensional portal between the Mindscape and Earth.
(Sleepwalker#32) - Cobweb told Rick that he was dead, and that he was being converted into the unliving material that was part of his realm. Furthermore, he went on to claim that Sleepwalker was the leader of the Mindspawn. Rick was reluctant to believe Cobweb, so the villain showed him some of Rambo's memories. Rick watched as Cobweb replayed images of Sleepwalker striking his body with a Mindrake.
(Sleepwalker#33) - Rick assumed that the Mindrake had indeed killed him. However, Sleepwalker attempted to use the Mindrake to return Rick's mind to his body. Cobweb sent his Mindspawn to Earth, where they possessed a group of humans in order to deal with Sleepwalker. Alyssa Conover thought Sleepwalker was attacking innocent people and struck him with the Mindrake. Sleepwalker found himself in the Mindscape, and was taken to Cobweb by his minions. Cobweb gloated on about his plans, and showed Sleepwalker what has happening on Earth as Alyssa tried to fight the Mindspawn away from Rick's coffin. Sleepwalker explained to Rick that he had not used the Mindrake to kill him, but rather to store his mind safely away in order to prevent the Mindspawn killing him. Rick looked at the image of his body and saw it had no signs of decay, enabling him to reject Cobweb's lies and resist his power. Sleepwalker retrieved the Imaginator from Cobweb's chest and banished him to a far away location somewhere in the Mindscape.
(Dark Reign Files) - Quasimodo researched Cobweb for Norman Osborn.