Owing its origin to the lost knowledge of millennia, the Onager Dunecrawler is based on the Mars Universal Land Engine; itself inspired by the bad-tempered beasts of burden that transported their masters across Holy Terra in ancient times. The Onager Dunecrawler, rather than being a mere people-carrier, is absolutely brimming with advanced, powerful weaponry capable of reducing worlds to wastelands.
This Adeptus Mechanicus Onager Dunecrawler was in the displays at Warhammer World.