War Prize (слэш)

Odin has invaded Earth with the help of the fire giants. Thor is being kept from Earth and Loki is helping Asgard with their war. When Tony is captured and brought to Asgard, he's certain that he's done for - but to his surprise, he finds an unlikely ally in a scheming Loki.
It turns out that the mage is in league with Thor to stop the invasion. The only catch? In order to keep Tony from being killed at dawn, he's told Asgard that he's taken Tony as his war prize.
Please read tags and chapter 1 notes for potential trigger warnings.