I love Transmigration the most.

Summary

In a guild facing a dire threat from the mobile fortress known as the Destroyer, Young Lady Luna calls for an emergency strategy meeting. With nearly 300 adventurers present, Luna explains the overwhelming power and speed of the Destroyer, which has decimated towns and is currently heading toward their location. As morale plummets, adventurers suggest various strategies, but all are quickly dismissed due to the Destroyer's formidable defenses. Amidst the despair, Aqua proposes that she might have a way to break the barrier surrounding the Destroyer, but only if she receives offerings in return. After some negotiation, she agrees to attempt to stop the Destroyer. Aqua leads Kobayashi and Sato Kazuma to a storage area, revealing a modified mecha she claims to have built as a devastating weapon against the Destroyer.

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