After the battle with Thanos, amidst the stillness of the aftermath, Tony Stark approached Vidar, the stoic warrior of Asgard whose presence exuded both power and determination. The air crackled with residual energy from the battle, but Tony's mind was focused on the future, shaped by the revelations of the Infinity Stones.

"Vidar," Tony began, his voice measured and serious, "Thanos is gone. But our work isn't finished."

Vidar turned to face Tony, his expression unreadable behind the battle-worn facade. "For me, it will never be finished until Thanos suffers as Loki did."

Tony nodded solemnly, understanding the depth of Vidar's resolve. "I know you're focused on Thanos. But hear me out—we have an opportunity to rewrite history, to prevent the tragedies that have brought us to this point."

Vidar regarded Tony with a hint of curiosity, his mind racing with the implications of Tony's words. "What do you propose, Stark?"

Tony's gaze met Vidar's, his eyes reflecting the weight of his newfound determination. "With the power of the Infinity Stones, we can go back before Thanos came, before Loki's death. We can change the course of events, ensure that Loki never faces that fate."

Vidar's silence spoke volumes, his thoughts a tumultuous storm of anger and hope. "And what of Asgard? What of my duty?"

Tony stepped closer, his tone earnest. "Your duty to Asgard doesn't have to conflict with ensuring Loki's safety. Together, we can make sure that Asgard's enemies are dealt with, while also protecting those we care about."

Vidar considered Tony's proposal carefully, weighing the risks and potential outcomes. The idea of altering time was daunting, yet the prospect of a future where Loki lived, free from the shackles of fate, resonated deeply within him.

"Show me," Vidar finally said, his voice carrying a rare note of agreement. "Show me this future you envision, Stark."

With a nod, Tony activated the Infinity Stones, bending time and space to his will. The scene around them shifted, reality warping as they were transported back to a pivotal moment—a moment before Thanos's arrival, before Loki's tragic demise.

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As they stood amidst the altered timeline, Tony and Vidar saw a world where Loki's fate was uncertain, where their actions held the power to shape a different future. Tony's mind raced with plans and strategies, while Vidar's resolve solidified into a singular purpose—to ensure that Loki was safe, no matter the cost.

Their alliance forged in the crucible of possibility, Tony Stark and Vidar embarked on their mission. Tony, driven by a newfound sense of duty and protection, began dismantling the foundations of SHIELD's rise to power, erasing every trace of Hydra's influence within Stark Industries.

Meanwhile, Vidar continued his relentless pursuit of Thanos, his quest fueled by vengeance and the promise of justice for Loki. Earth and its affairs were inconsequential to him; his focus remained unwavering on avenging his brother and ensuring that Thanos faced the consequences of his actions.

Occasionally, Tony and Vidar's paths crossed—brief moments of strategic coordination and mutual respect amidst their divergent pursuits. Tony provided technological support and intelligence, aiding Vidar in tracking Thanos's movements across the cosmos.

Their exchanges were efficient, devoid of the usual banter and camaraderie. Each communication was a testament to their shared commitment—to rewrite history, protect their loved ones, and forge a future where their losses were not in vain.

And as they navigated the complexities of reshaping their reality, Tony Stark and Vidar knew that their journey was far from over. In a universe fraught with danger and uncertainty, they remained steadfast in their alliance, their actions guided by a shared purpose—to protect what mattered most, to pursue justice, and to ensure that Loki's future was one of freedom and possibility.