Heavy Support Squads provide the Legiones Astartes with mobile, infantry-portable firepower sufficient to bring down hordes of enemy troops or smash armoured vehicles apart with withering hails of fire, combining devastating armaments with all the flexibility of a footsoldier. Heavy flamers project a roaring torrent of burning promethium capable of incinerating infantry and flushing foes from cover, while multi-meltas reduce enemy tanks to molten slag with a flash of energy, and plasma cannons unleash volatile blasts of superheated matter.