Infinity War, to be clear. Nox, with his full resources, shows up at the same time as Wakanda opens a gap in its shield. He wants the completed Infinity Gauntlet for himself to bring back his family, so he's not really there to help or hinder, but to find Thanos, get the gauntlet, and get the mind stone. Can he beat Thanos and get the gauntlet? If he does, does he bother explaining his relatively benign purpose for it, and does anyone listen if he does? Assuming he doesn't or they don't, can anyone stop him from then getting the mind stone?
Here's a bit of Nox for reference: