Guardian Lion Roar [two-actions] Feat 8Auditory Inventor Sonic Source Tian Xia Character Guide pg. 111
Your innovation is augmented with plates shaped to resemble the gaping maws of guardian lions, which you can energize to expel a stream of sonic energy reminiscent of a lion’s powerful roar. All creatures in a 20-foot line from your innovation take 2d8 sonic damage with a basic Fortitude save against your class DC. Creatures that fail this save become
off-guard for 1 round. The damage from this effect increases by 1d8 at 10th level and every 2 levels thereafter.
Unstable Function You press concealed switches in the guardian lions’ plates, extending their reach and power. Add the unstable trait to Guardian Lion Roar. The range of your roar increases to a 60-foot line. Creatures that succeed (but not critically succeed) at their save also become off-guard for 1 round. On a critical failure when attempting the flat check for this unstable action, you take sonic damage equal to your level instead of fire damage.
Special If your innovation is a minion, it can take this action rather than you.
Traits
Auditory: Auditory actions and effects rely on sound. An action with the auditory trait can be successfully performed only if the creature using the action can speak or otherwise produce the required sounds. A spell or effect with the auditory trait has its effect only if the target can hear it. This applies only to sound-based parts of the effect, as determined by the GM. This is different from a sonic effect, which still affects targets who can’t hear it (such as deaf targets) as long as the effect itself makes sound.
Sonic: An effect with the sonic trait functions only if it makes sound, meaning it has no effect in an area of silence or in a vacuum. This is different from an auditory spell, which is effective only if the target can hear it. A sonic effect might deal sonic damage.