The Mantolith was a large assault drill used to deliver troops in subterranean assaults during the Great Crusade and Horus Heresy. These vehicles were large enough to allow for teleportation chambers, allowing them to deliver troops to its target without breaching the surface. Several Mantolith's were used by the Sons of Horus during the assault on the Saturnine Gate in the Siege of Terra.

地幔岩是一种大型突击钻，用于在大远征和荷鲁斯叛乱期间进行地下突击。这些载具足够大，可以容纳传送室，使它们能够在不破坏地表的情况下将部队运送到目标。在泰拉围城中，荷鲁斯之子在攻击土星之门时使用了几辆地幔岩。