Praxus was the home city-state of Prowl and Bluestreak. One of its key locations was the Helix Gardens, where crystals were arranged in a beautiful manner to create a place of contemplation. It also hosted The Assembly, a "center of Autobot science, technology, art, philosophy and culture." Like so many others, Praxus went from shining metropolis to bombed-out wasteland during the course of the Great War. Just keep thinking... 'Til all are one.