ThunderingItem 8+
EvocationMagicalSonic
Source Core Rulebook pg. 585 2.0
Usage etched onto a weapon
This weapon lets out a peal of thunder when it hits, dealing an extra 1d6 sonic damage on a successful Strike. On a critical hit, the target has to succeed at a DC 24 Fortitude save or be deafened for 1 minute (or 1 hour on a critical failure).

Thundering
Item 8Source Core Rulebook pg. 585 2.0Price 500 gp
Thundering (Greater)Item 15
Source Core Rulebook pg. 585 2.0Price 6,500 gp
The save DC is 34, and the deafness is permanent. Sonic damage dealt by this weapon ignores the target’s sonic resistance.