Bleach: Thousand-Year Blood War - The Calamity Episode 8 finally brings Sosuke Aizen back into the fight after a long stretch spent watching from the sidelines. The introduction of Aizen seems to bring a much-needed momentum shift in the story as major characters, who have been absent from the conflict for several weeks, are brought back into the conflict.
Bleach: Thousand-Year Blood War - The Calamity Episode 8 is centered around Aizen finally getting back into battle alongside Orihime and her companions, working to mend Ichigo's broken sword. The episode ends by revealing that three separate battles will be taking place concurrently in the Soul Society, Hueco Mundo, and the living world.
Orihime and Tsukishima Restore Tensa Zangets

A huge progression in Bleach: Thousand-Year Blood War - The Calamity Episode 8 is the shattering of Ichigo's Tensa Zangetsu and the efforts to get it back. Orihime is done fighting and gets to work on fixing the sword, a reminder of her protectiveness over Ichigo exhibited from the very first episode of the series.
Her abilities are not enough to repair what Yhwach destroyed, and so Tsukishima uses his Book of the End to create a different timeline where the sword was not broken. With collaboration from Ginjo and the rest of the Xcution members, Ichigo’s weapon is fixed just in time for him to jump back into the fray.
Aizen Returns to the Battlefield

In Bleach: Thousand-Year Blood War - The Calamity Episode 8, Aizen is released from his restraints and thrown straight into the action against Yhwach. In this episode, Aizen gets the opportunity to regain his reputation after being defeated by Ichigo. He does manage to show just how cunning he can be by utilizing Kyoka Suigetsu’s powers of deception.
However, Yhwach manages to see through his trickery until the end of the fight. Nevertheless, this particular episode manages to remind fans as to why Aizen remains one of the most clever evil-doers throughout the franchise.
Renji's Sacrifice Alongside Ichigo in Bleach: Thousand-Year Blood War - The Calamity Episode 8

Renji’s role remains among the more stirring ones in Bleach: Thousand-Year Blood War - The Calamity Episode 8. He rushes to Ichigo’s side after he can finally help him amid his own injuries, even though he knows that there’s hardly any hope for them to win.
This leads to Renji suffering, for his endeavor to help Ichigo resume fighting calls him to bear wounds that he’d rather avoid. But at that moment, his steadfast personality allows Ichigo to make a decisive strike against their opponents and reinforces the friendship of the two heroes in the final points of the war.
Three Worlds, One Final Battle
The final act of Bleach: Thousand-Year Blood War - The Calamity Episode 8 shows us that Yhwach has divided the battle into 3 fronts – Soul Society, Hueco Mundo, and the human realm. Each area will see a major battle take place, with various captains and the allies of Ichigo pitching in.
This major division also suggests a plot of grander scale than previously anticipated, as Shunsui leads the defense of Soul Society while Halibel leads the Arrancar in Hueco Mundo. In addition, this production news reveals that the studio will release the next 2 episodes after 1 month delay, giving them more time than ever to complete the series.