Plan-1051 Behemoth: A Machine Too Heavy to Exist
SPOILER! A21 · Takuma Kugayama · Continuous Lambda DriverThe Plan-1051 Behemoth is so large that its most impressive weapon is not a cannon. It is the Lambda Driver keeping the machine standing. Without that continuous support, the Behemoth's own mass becomes its weakness.
How you can tell
Conventional attacks barely matter while Takuma keeps the Lambda Driver operating. Kaname and Tessa eventually realize that the same system making the Behemoth nearly untouchable is also doing the exhausting work of preventing the machine from collapsing under itself.
Why it worked
Sousuke does not defeat the Behemoth by overpowering it. He attacks the dependency holding the entire design together.
Why it matters
Episode 12 turns Black Technology into a design problem. The Behemoth looks impossible because it literally is impossible without the Lambda Driver constantly cheating the normal rules.