A Prismatic Cannon is a heavy Eldar weapon that uses a scaled down version of the Prism Cannon technology utilised in Eldar Fire Prism grav-tanks. The Prismatic Cannon utilised only by the mysterious Harlequins, and uses multiple laser arrays set around a fashioned shard of psychocrystal to project searing beams of energy into foes. The weapon's apertures can be adjusted in order to focus or broaden its destructive might at will. These weapons are usually mounted upon specialised open-topped, anti-gravitic Harlequin gunships known as Voidweavers.
- Codex: Harlequins (7th Edition) (Digital Edition), pp. 56, 208