New From Forgewold today is the Leviathan Siege Dreadnought with Cyclonic Melta Lance and Seige Claw.
Leviathan pattern Siege Dreadnought with Cyclonic Melta Lance and a Siege Claw £72
https://www.forgeworld.co.uk/en-GB/Leviathan-Dreadnought-with-Cyclonic-Melta-Lance-and-Siege-Claw
Created in limited numbers in the latter days of the Great Crusade, the Leviathan pattern Siege Dreadnought was developed in secret on Terra, away from the pervasive oculars of the Mechanicum. Its massive frame incorporates hybridised technologies, some dating back into the dim past of humanity. Towering over later Imperial walker patterns, this heavily armoured dreadnought is savagely powerful.