Thunderclap
Spell — see Magic and Spellcasting for the rules and the Spell Index for the full list.
Arcane 1 Type: blast, elemental (air)
Range: 90’ Duration: instantaneous
A deafening peal of thunder resounds at a point of the caster’s choice. The thunderclap is so loud that it can be heard as a low rumble by creatures up to 10 miles away. Each creature within 5’ of the thunderclap must make Blast saving throw. If the save fails, the creature suffers 1d6 extraordinary bludgeoning damage and is deafened. If the save succeeds, the creature suffers half that damage but is not deafened (though its ears may ache and ring).
A deafened creature is easy to sneak up on and suffers a -2 penalty to surprise rolls. It can be backstabbed by an opponent outside its line of sight as if the creature were sneaking. Due to its inability to hear itself, a deafened creature has a -4 penalty on any throws that require vocalization (such as a using Magical Music proficiency). The deafened creature can make another saving throw at the end of its initiative each round. If the save succeeds, it is no longer deafened.