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.
I'm going to use my entire existence 
to destroy you!
!سأستعمل وجودي بأسره لتدميرك
Ich werde meine gesamte Existenz
aufs Spiel setzen, um dich zu vernichten!
¡Para destruirte con todo mi ser!
¡Para destruirte con todo mi ser!
J’ai misé mon existence même
L'obiettivo della mia intera esistenza
Vou usar toda a minha existência
para destruir você!
Теперь всё моё естество пойдёт
на то, чтобы уничтожить тебя!