Towering over other automata and packing a devastating Sollex heavy-las for blowing vehicles to smithereens, The Thanatar Calix Siege-automata is one of the biggest bruisers in the Mechanicum arsenal. Punching on a par with the mighty Leviathan Dreadnoughts of the Legiones Astartes, anyone who tries to get under the reach of their shoulder-mounted cannon will find a graviton ram to the face hurts just as badly.