innate level 3 - no class learns it from a spellbook
Range
Touch - 2.25 metres
Can be aimed at
a creature, an item, a door or a placeable
Counts as an attack
Yes - casting it on someone is a hostile act
How it works
Not a spell anyone casts: it fires from a full item set worn by one of the fighter classes, on a hit, and there is no way to aim it.
How often it fires is the set's tier: 4 per cent at tier 1, then 6, 8, 10, 12 and 16.
Bludgeoning damage in six-sided dice, and the number of dice is the set's tier as well: 2 at tier 1, then 4, 6, 9, 12 and 15. Your own level does not change it.
It bursts in a sphere of 5 metres where the blow landed. It needs line of sight, it never hurts the wearer, and it reaches a creature later the further out that creature stands.