A Fusion Cascade is a T'au Melta Weapon designed for deployment on the XV9 Hazard Battlesuit. Making use of a potent nuclear fusion reaction, it is an experimental variant of the Fusion Blaster that sacrifices damage for rate of fire, with each burst unleashed by the weapon consisting of multiple shots.
This means that despite each charge being less powerful than an equivalent Imperial Melta Weapon of similar size, the Fusion Cascade can overwhelm its target through sheer weight of fire and is still able to reduce even the most heavily armoured vehicles or fortifications to slag in the blink of an eye.
- Imperial Armour Apocalypse II, pg. 58
- Rogue Trader: Tau Character Guide (RPG), pg. 38