Six Infinity Stones

"Before I explain why someone could destroy half the life in the universe, I may need to start from the beginning of the universe." Stephen Strange swept his gaze across the Avengers members, finally lingering on He-El's face. "?" The beginning of the universe? Was he kidding? The Avengers members felt that Stephen Strange was joking. What kind of span across light-years was this? Starting from the beginning of the universe—was that really something the Avengers, or they themselves, could intervene in?