Asgardian Magic
What if Loki was able to warn his past self, so he did not lose control during his regency and was able to act as he normally would? What if he had been able to remain calm and in control of himself, and the situation?
"How?" Loki demanded.
"Betrayal," his future self stated simply, rage clear in every syllable. "But you must control your reaction and come to see me, or you will repeat my mistakes and we will miss an opportunity to take control and alter things in our favor."
It would have changed everything.