Plasma mortar
From Halopedia, the Halo wiki
The Plasma Mortar is a Covenant vehicle-mounted ground weapon.
Exclusively outfitted on Wraiths and Brute Wraiths, the plasma mortar fires huge balls of slowly moving superheated plasma with a large explosion radius and slow rate of fire. It is extremely powerful and kills in a single hit.
It uses indirect fire meaning that it can be fire to just about anywhere on a battlefield without worrying about obstructions such as hills etc.
A giant stationary plasma mortar was seen destroying buildings in the halo 2 e3 demo video. Sergeant Banks called HQ and 3 Longsword fighters nuked it.
Sources
- Halo: The Flood
- Halo 2-Outskirts Level
- Halo 2 E3 Demo