Guild talk
In one go, The shortsword's ability allowed Eldrian to use the blade in a similar way to Maiden's Purity. Only far weaker. Using it would also destroy the weapon. So it was actually quite amazing that it had survived.
Unlike Maiden's Purity, the spell would unleash a simple explosion. From the description, Eldrian assumed that it worked by overloading the crystal embedded in the hilt. It would work like a grenade if used.
'Perfect for small spaces or when I am facing someone stronger and need some space.' Eldrian had thought when he saw the blade. Most had ignored it due to it being a one-use item, if one planned to use the ability at least. It still functioned perfectly as a blade, just without something snazzy to show off.