Sacred Harmonics: The Ducateon craftswman and religious authorities have created a singular effect based on acoustic tones and religious chants particularly formed with Ducateon physique.
Understanding them: A Bard or a character with the singing capability can make an Insight DC 17 check. Success means they understand that the chamber they are in resonates deeply and sound can be used as a weapon.
Raw
Common
Mastery
Using them: Given the short time to understand, only 3 effects can be made – whispers/”shushing” become like daggers when bounced off the walls (D3/2 attacks; D4/2 damage but with advantage), low tones are shields (+3 AC whole round and -1 damage/+5 as a Reaction to 1 attack), and a scream may hurl vocal javelins (D6/3) damage to screamer, hurls D6/3 ‘javelins’ per Action up to 60’ for D6/4 damage. All use Sanity adjustment as a damage modifier.
Raw
Common
Mastery