The weapon appears to be radiating in energy. This effect is purely cosmetic.
Similar Boss Rewards
These are other challenge rewards for completing The Throne Room on Easy, Medium and Hard difficulty as other classes.
- Shredder - Core drop version
- The Earth Shaper - Map reward for Glitterhelm Caverns on Insane and Nightmare difficulty as a Squire
This weapon may be a reference to Games Workshop's dystopian tabletop game, Warhammer 40K.