How did Quicksilver die? Pietro died in the same movie in which he was introduced, saving Hawkeye and a Sokovian child from a hail of Ultron-fired bullets. He was fast enough to move Clint Barton and the boy to safety but apparently not to dodge the bullets himself.
How did Quicksilver die in Age of Ultron?
Quicksilver getting shot and killed by Ultron After the dust settled, the bullet-ridden Pietro then took one last glance at Barton, remarking if he saw that coming before collapsing dead from his many gunshot wounds.
Why did Marvel kill off Quicksilver?
First, his death was meant to raise the stakes of the story and show that there would be lasting consequences for Ultron's actions. Second, it subverted viewers' expectations.