"their powers, the horrors in our heads, ultron himself, they all came from the mind stone, and they are nothing compared to what it can unleash. But with it on our side-" Steve interrupted Thor.
"Is it? Are you? On our side?"
It hesitated. "I don't think it's that simple."
"Well, it better get real simple real soon."
"I am on the side of life. Ultron isn't. He will end it all."
"What are you waiting for?"
Bruce walked up to the red humanoid creature, threateningly saying, "if we're wrong about you, if you're the monster that Ultron made you to be,"
"What will you do?"
Bruce staired at it. It started walking away from Bruce. "I don't want to kill Ultron. He unique. And he is in pain. But he must be destroyed. Every form he's built, every trace of his presence on the net. We have to act now. And not one of us can do it without the others."
Stark glanced at Loki after it said this.
"Maybe I am a monster. I don't think I'd know if I were one. I'm not what you are. And not what you intend. But there may be no way for you to trust me. But we need to go."
He lifted Mjolnir so as to give it to Thor. Everyone was silently stairing at it. A thud sounded throughout the room, but everyone just continued stairing. (Loki had passed out. Again. For the fifth time.)
Thor slowly grabbed the hammer, and the humanoid walked off, acting like nothing had happened.
"Three minutes. Get what you need."
Loki got up with the help of Tony, and they had a lovely three seconds of silently questioning what the fuck just happened.

Loki shifted what he was wearing to his armoured outfit and summoned his helmet. He attached an earpeice to it, so he could communicate with the Avengers while fighting.
Stark grabbed Friday, another AI he had that had'nt managed to take over the internet and connected it to his suit.

Loki boarded the Quinjet and stood next to the humanoid Robot. It turned and started studying the jet, brushing against Loki's shoulder accidentally as it did.
Loki froze. His head felt like it had exploded. He dropped to the ground, gripping his head. He shut his eyes as hard as he could. As fast as it had come, it disappeared.
But when he opened his eyes, he wasn't in the Quinjet. He was kneeling on a cold, stone ground. In front of him, it was another Loki, and someone else he recognized as the Other who had worked for Thanos. It was dark around him, yet he could see him stars peppered in the sky.
He looked up and saw the other give Loki his septor. Loki's eyes glowed blue, and just like that he was back in the Quinjet. He had a lesser pain in his head, and he realized he was drooling. Tony had moved next to him, and was patting his back.