It doesn't take long for Peter and Mysterio (aka Quentin Beck, played by Jake Gyllenhaal) to strike up a mentor-mentee relationship after being introduced in Venice by Nick Fury. Like he once did with Tony, Peter vents to Beck about the pressure he's facing as a superhero and the losses he's experienced. "Saving the world requires sacrifice," Beck tells him. "Sometimes, people die."
Unfortunately for Peter, putting his trust in Beck doesn't go as planned. The young web-slinger thinks that Mysterio could be "the next Iron Man" and tells him so while handing over the E.D.I.T.H. glasses. Beck takes advantage of Peter's willingness to believe the best in people and later betrays him.