In episode 37 of The Thousand Year Blood WarThe deadly battle with Sternritter X – Lille Barro continues as he survives the effects of Shunsui Kyoraku's Bankai: Caten Kyōkotsu. Karamatsu Shinju Quincy rises again. Now transformed into a cherubim dragon angel. This enemy proved to be too strong for even the Captain. This forced him to give his secret lieutenant, Zanpakutō Shinken Hakgyōgen.
Lille Barro's final form was Vollständig's second stage. which only he possesses Here's everything you need to know about Lille's Barro final form. From the reason he has it His connection to Yhwach and his special abilities in Bleach TYBW.

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Lille Barro, Closest to God
His masterpiece
Lille Barro was the first Quincy to receive a schrifft from Yhwach, in his own words. He is closest to God. His masterpiece. He considers himself above all else. It is God's own messenger. He demonstrates this through his otherworldly power and devotion to his king. Being an ancient Quincy and the first to receive his power makes him unique among other Sternritters. And perhaps this is why Vollstendig is so expanding and immortal.
Most Sternritter have the ability to use Vollständig, a transformation that boosts Schrifft and gives them additional abilities, similar to Soul Reaper's Bankai or Arrancar's Resurrection. Lille dominates the outpost. Uniquely Vollstendig's Second: Gilliel Similar to Cuatro Espada, Ulquiorra Cifer, aside from his Resurrection: Murcielago, he has the extremely powerful Segunda Etapa. And he is the only one in the Espada group who has this trait. Lille Barro is the same.
I am immortal. I am invincible. I am an ambassador of God with privileges appropriate to this. When confronted with the angel of God There is nothing a sinner can hope to accomplish!
Lille receives full power from Captain Shunsui Kyoraku's bankai: Caten Kyōkotsu Karamatsu Shinju Bankai that guarantees the death of its target. Even so, Lille is resurrected. time By transforming into a dragon creature that resembles a cherub. Beautiful angel of God Lille has a new head He has beautiful colored hair that is swept back but has an owl's face. The neck is long like a snake and has hair on the back. His shoes were extremely stretched out. Makes him look like a centaur. And he grew new arms. Lost in Vollständig But it was much bigger, which suited his new form.
His Heiligschein has greatly decreased in size. and his wings changed shape Now resembling a bat instead of an insect like before, Heiligchein and his wings turned a bright metallic gold. It seemed that he no longer had organs, flesh, or bones. Because his insides were filled with pure light that damaged his enemies if they came into contact with them, his voice finally changed. There was no longer the same deep, quiet voice. Instead, it was a high-pitched, distorted alien voice.

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Lille Barro's final form ability
Attack the sinner
In his final form Leal might be the strongest Quincy besides Yhwach. His power increased to such a degree that he was considered a divine being beyond just himself. but also from Shunsui Kyoraku too Lille becomes the closest thing to a god in Bleach, like Yhwach after absorbing Soul King Adnyeus, in addition to expanding his Schrifft, X – Axis, to its highest level. He also gained a few more powerful abilities.
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Lille Barro is a Sternritter X – The X – Axis that has the power to shoot anything in its path. who is the ultimate sniper
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His first Vollständig, Jilliel, transformed him, enhancing his powers.
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He survived Shunsui Kyoraku's Bankai due to his close proximity to Yhwach.
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His second step transformed him into a dragon cherub, a divine creature.
Creating light: Liel can channel light within his body to use as a weapon. With this light, he was able to radiate dense golden light into a powerful beam that had the properties of X-axis spatial penetration. Lille can destroy everything in their path. Even large areas of the city without leaving any traces behind He can also create it into a large ball of light to remove every shadow from the environment in an attempt to counter Shunsui Kyoraku's Kage Oni abilities.
Sabakino Komyo/Rei of Judgment: By raising one arm Lille suddenly flashed a divine golden light towards him. Completely destroys part of one of Wahr Welt's cities, causing a massive explosion along the blast's path.
trompet: Lille's ultimate attack. Leal gathered a huge amount of reishi mushrooms to create a gigantic golden trumpet on top that was even bigger than himself. When it blows with beautiful music It fires a giant X – Axis blast that destroys everything in its path. The Trompete is powerful enough to completely destroy the Wahr Welt cities of Lille, Shunsui, and Nanao, but it is also disastrous for Lille as the Shinken Hakkyoken of Nanao Ise reflected back at him and destroyed the sacred Quincy.

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Although Lille Barro's final form received mixed opinions from fans, But it's also one of Tite Kubo's most creative designs in Bleach. Lille's first step into the show, Vollständig, was based on a Biblically correct angel. while his second and final step was the shape of a distorted cherub. Lille represents the fanatical follower of a god who loses himself in the service of his god.

Bleach: The Thousand Year Blood War