Many people might not know Incursio, but a vast majority have likely heard of the anime it comes from, because it is even more ruthless than Legendary Jiang Yuyan—that is, the TV show where everyone gets killed off until only the title remains.
At least *The Proud Twins* left the title character alive, whereas in *Akame ga Kill!*, though not explicitly stated in the anime, the world-building implies that in the end, even the title character perished, truly deserving of the label "none survived."
The reason Ye Feng chose Incursio instead of so many handsome mechas or armors is actually very simple.
Chapter 345