I just want to say that I'm not a native speaker. Thus, you'll probably find some mistakes but I'll do my best to avoid them.
Prologue
'How will your friends have time for me when they're so busy fighting you?' Loki breathed hatefully while approaching the man in front of him carefully.
Tony Stark locked eyes with him. He took an enjoying nip of his freshly poured scotch. The ice-cubes in the polished glass clinked gently with every new sip.
The black-haired god raised the sceptre threateningly high - it pointed directly at Tony's chest - and laid the dangerously spiky end on it. But to Loki's amazement, he felt an unnaturally strong resistance, something which definitely wasn't human skin. As the rod touched his victim's shirt, it caused an almost inaudible clank.
Loki contracted his eyebrows to an obviously confused expression; his opposite silently looked down at the bluely glowing sceptre. The black-haired snatched it and whipped it yet again at the allegedly tender spot. Nothing happened.
Startled, Tony glanced up while Loki was busy wondering about what was happening, 'That usually works.'
Being in cold fury and regardless of any consequences, the Norse god made a last attempt and smashed his weapon at Tony's chest, who already was bragging to himself, 'Well, performance issues, it's not uncommon. One out of five-'
The billionaire's dark-blue shirt burst; tiny cracks explosively spread out inside the thin glass-layer which protected his heart and at last... it shattered. Little splinters fell down, onto the shiny tile floor, as Tony desperately gasped for air. Loki's mouth warped into a sardonic grin when he observed the body of his enemy convulsing in agony. His emerald eyes sparkled at the sight of this.
Suddenly, even the son of Laufey felt a strange tingling in his hand and arm. Before he and Tony could react, an enormous flash shot out of the mind stone, which was hidden in the sceptre. Both of them were hurled through the air, flying several metres before Loki landed on a huge leather-couch and Tony on a barstool, which immediately shattered into a thousand tiny pieces.
The Norse god was the first to pick himself up; the cosy sofa had considerably soften his fall. He quickly picked up his weapon, which he wasn't able to hold on to during his flight. However, the metal of the handle was surprisingly hot. But he didn't know if it was because he was hallucinating or if the little explosion was the cause.
Gentle sunlight shone through the Stark Tower's enormous window-wall at the on the floor laying billionaire. It revealed a blood-smeared arm and a shredded shirt, which logo was destroyed beyond recognition. Tony laid heavily breathing on shavings of expensive mahogany, whose sharp edges drilled their lines in his flesh.
He slowly opened his eyes, groaning, he placed one hand on the no longer clean floor. He pushed himself upwards with all might, thus raising his upper body and looking directly at Loki.
His chest rose and fell with an insane speed; a hole, outlined by sharp-edged splinters, was now there, where a round bullet-proof glass had been. From there a sky-blue, nearly whitely, light radiated. Which, at direct sight, was almost blindingly bright.
A similarly blue glow pulled itself alongside Tony's neck to his head and let his eyes light up briefly. During this, Loki carefully walked up to the genius, who was clearly put out of action. The second he had recognised a distinct light-blue flare, he delightfully whispered, 'What a pleasant twist.'