Loki Teased How Season 2 Would Fix Everything In Episode 1

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Warning! This post contains SPOILERS for Loki season 2, episode 4
Summary

Now that the TVA's magic-neutralizing systems are deactivated, Loki could potentially use one of the Infinity Stones the TVA had archived in to restore the TVA and the Time Loom.
If this is possible, Loki could also use a Time Stone to go back in time and stop Sylvie from killing He Who Remains.
Marvel Comics lore says the Infinity Stones don't work outside their home universe, but Avengers: Endgame already showed them in action in a different timeline.

Loki seasons 1 and 2 secretly teased how the TVA and the MCU multiverse will be restored after the Time Loom explosion. As the Multiverse Saga continues to develop, Tom Hiddleston's Loki becomes increasingly crucial for the entire franchise. Not only does the God of Mischief lead the TVA in their quest to bring order to every existing timeline, but he also faces his own challenges in the form of time-slipping and convincing Jonathan Majors' Victor Timely to cooperate despite Sylvie's threats. The Loki season 2 finale is getting closer, however, and the Time Loom's explosion puts a new obstacle on his path.
Against what Loki and his allies expected, Loki season 2 episode 4's ending featured the worst case scenario for them and the TVA. With Victor Timely dead and the Time Loom destroyed, the temporal radiation that engulfed the TVA might bring Loki back to square one, or possibly even further back. Fortunately, Loki might still retain all the information he has learned so far. More specifically, two details Loki learned in Loki season 1 and 2 could become the key to bring things back to normal.
Your browser does not support the video tag. Loki Season 2 Episode 1 Explained How Loki Could Stop The Time Loom Explosion

Loki season 1 episode 1 revealed that the Infinity Stones are useless at the TVA, as Casey explained to the freshly captured Loki that the TVA kept many Infinity Stones in a drawer and used them as paperweights. Nobody at the TVA seems to care about the stones, as they are harmless in comparison to the TVA's wide array of time-related weapons, and also because all kinds of magic are prohibited at the TVA. But now that Loki has proved his worth as a hero, the TVA is in urgent need of help, and the flow of time has begun to affect the TVA itself, one of the archived Time Stones could become Loki's best tool to restore the TVA and possibly the Time Loom.
Introduced in Doctor Strange, the MCU's Time Stone makes it possible for the user to move time back and forth, affecting everything from a single apple to an entire alternate dimension. If Loki gets his hands on a working Time Stone — and if he can still access them at the TVA in the first place — he could target the Time Loom and bring it back to its original state, complete with every organized timeline. Otherwise, Loki could use a Time Stone to go back in time and stop Sylvie from killing He Who Remains back at the Citadel at the End of Time. Although Wong once said that mishandling the Time Stone could damage reality, it's possible that Time Stones have less negative side effects outside the regular time-space continuum.
Why Loki Might Be Able To Use The Infinity Stones Now

One problem with using a Time Stone at the TVA is that the TVA headquarters have a system that automatically nullifies all kinds of magic, which is why neither Loki nor Sylvie could use their sorcery against the TVA agents that captured them. However, Miss Minutes' deactivation and the general chaos at the TVA in Loki season 2 episode 4 shut off the TVA's defenses against magic. While there wasn't much Loki and Sylvie could do in the little time they had between regaining their access to magic and the Time Loom's multiple-timeline explosion, it's possible that Loki can now use his magic and the TVA's Infinity Stones to fix everything.
That is, of course, if the Infinity Stones work outside their home universe. In Marvel Comics, the Infinity Stones usually become inert outside the reality where they belong. So, even if the TVA's defenses against magic were down, the Infinity Stones could be useless. Still, the MCU already showed a set of Infinity Stones working perfectly in a different timeline during Avengers: Endgame, where the Avengers borrowed all six Infinity Stones from the past, used them in their present, and brought them back to their original timeline without any negative repercussions in their universe.

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