Here’s the opening battle scene from “X-Men: Days of the Future Past” where many young and future-era mutants revealing their power before an ultimate battle against Sentinels.
For those who don’t know; The Sentinels, mutant-hunting robots, first appeared in The X-Men (vol. 1) #14 (November 1965). A typical Sentinel is three stories tall, capable of flight, can detect mutants and projects energy blasts
Enjoy!
B.