This Worldly Beast

Kevin summons 3 Historic Crystal: Paleozoic to attack.
[Strategy] Kill all Historic Crystal: Paleozoic.

This Worldly Beast rotates its arms to smash the platform once and creates a spreading shockwave.
[Strategy] When killing Shadow of Era Annihilation, watch out for This Worldly Beast's attack.

This Worldly Beast raises its arms and summons two Shadows of Era Annihilation that fly swiftly.
[Strategy] Use Herrscher of Finality's aerial attacks to break Shadow of Era Annihilation's hit shield.

Kevin summons 3 Historic Crystal: Mesozoic to attack.
[Strategy] Kill all Historic Crystal: Mesozoic.

Kevin commands Mesozoic Era: Chimera's System to break away from This Worldly Beast and attack.

Mesozoic Era: Chimera's System breaks away from This Worldly Beast and homes in on the target.
[Strategy] Continue attacking Mesozoic Era: Chimera to break the hit shield.

Kevin creates a small Zone of Elimination, which restricts the movement and certain actions of the targets within.

This Worldly Beast continuously sweeps the platform with its bone spikes. After each sweep, Mesozoic: Chimera's System will follow up with an attack. After parrying the bone spikes 3 times, This Worldly Beast will unleash Chimera's Brutality, which breaks Zone of Elimination when it's over or parried.
[Strategy] Tap [ATK] to parry the attacks from This Worldly Beast and Mesozoic Era: Chimera.

Mesozoic Era: Chimera constantly summons many Honkai Beasts to attack, but doing so exposes its weakness.
[Strategy] Use Herrscher of Origin's Ultimate to suppress Mesozoic Era: Chimera.

Kevin summons 3 Historic Crystal: Cenozoic to attack.
[Strategy] Kill all Historic Crystal: Cenozoic.

After charging up, Cenozoic: Diabolical Transcendence fires a huge, continuous beam forward.

Cenozoic: Diabolical Transcendence spreads its huge pincers to attack a large area.

Kevin summons many Shadows of Era Annihilation that fire beams at locked-on targets. Afterward, Cenozoic: Diabolical Transcendence will break away from This Worldly Beast and attack independently.
[Strategy] Use Herrscher of Truth's multiple lock-on to quickly kill all Shadow of Era Annihilation.

This Worldly Beast uses its arms to attack the platform repeatedly.
[Strategy] When killing Shadow of Era Annihilation, watch out for This Worldly Beast's attack.

Cenozoic: Diabolical Transcendence breaks away from This Worldly Beast and stretches its pincers to attack.

Kevin creates meteors right above himself and crashes them into meteors pulled from a distance. The collision will generate numerous meteors that fall onto the platform.