The Mastodon is one of the heaviest assault transports in the arsenal of the Legiones Astartes, and one reserved for use against the most heavily fortified positions. Several times the size of a Land Raider, its transport bay can convey over forty Space Marines – or four Dreadnoughts – through the most perilous of battlefields. The Mastodon’s primary role is to deliver these troops directly into the breach created by its siege melta array. Few fortifications can withstand this fearsome weapon, the Legionaries passing through melted stone, steel and flesh to press directly into the heart of the enemy.