Original sentence: Healing May Parker in exchange for changing the personal timelines of Peter Parker (Spider-Man) and Mary Jane Watson so that they never married, claiming he did so because he hated their happiness.It is believed  that Mephisto and many other "Hell Lords" were created from the primeval concentration of evil energy left in the wake of the fleeing Elder Gods when they were driven from the Earth by the entity Atum millions of years ago
Edited sentence: As Mary Jane's part of the deal, she offers to give Mephisto any child she might have ever had with Peter, presumably so Spider-Man's identity will go back to being unknown and Harry Osborn will be revived from the dead.He cultivates this interpretation for the influence it gives him over humans who believe in the teachings of Christianity.Healing May Parker in exchange for removing the marriage of Peter Parker (Spider-Man) and Mary Jane Watson from their memories, so that they would never have married, claiming he did so because he hated their happiness and to take pleasure in the agony of their souls.It is thought  that Mephisto and many other "Hell Lords" were created from the primeval concentration of evil energy left in the wake of the fleeing Elder Gods when they were driven from the Earth by the entity Atum millions of years ago