Loki tries to provoke the Avengers by summoning a Tony Stark from fifty years down the timeline, grabs him and snarls that the Avengers should not do anything or he’ll kill their future friend.
The summoned ninety-six year old is disappointed in him.
He tells Loki this, tells Loki that with his brilliant mind he should think of other ways to defeat the Avengers than holding hostages. It’s the crudest kind of emotional manipulation. He knows Loki can do better than this, he’s had over a thousand years to learn for Earth’s sake. Loki should let him go and think of a plan that uses his best asset: no Loki, not your magic, your brain.
“And of course,” The older Tony adds at the end. “consider that Thor is always going to take you back as a brother. You’ve only kept fighting with everyone because you can’t accept what you are and can’t believe that he doesn’t care. Consider using that brainpower to believe you can be something other than a villain, okay?”
Loki stares at him in astonished horror, then drops him and teleports away. Crapcrapcrap this Tony KNOWS.