The only way to beat the giant Beta is via direct attack to the brain, forcing Ogre into a very perilous situation. Auctioneer risks his life to locate the brain, and Ogre uses Number 11 to take it out and defeat Beta.

He reunites with the Squad and celebrates, but his joy would be short-lived.
Proof of Humanity
المعركة 011 - برهان البشريّة
Das Zeugnis des Menschseins
Batalla 011: Prueba de humanidad
Batalla 011: Prueba de humanidad
BATAILLE 011
La prova di essere umano
Prova de humanidade
Сражение одиннадцатое Доказательство человечности