A few years ago in the prison dimension, the Kraang made you, knowing that one day, they’d be released, and you’d be the strongest weapon they had

Raphael: “It’s over Kraang!”

Michelangelo: “Yeah! We’re gonna take you DOWN!”

Leonardo: “There’s nowhere left for you to go”

Donatello: “And you’ve got nobody to turn to!”

Kraang: “Oh I wouldn’t be so sure.. You haven’t met my greatest weapon yet…”