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From Pathfinder Lost Omens Ancestry Guide, which isn't enabled.

Yamaraj's Grandeur

FEAT 17
Activity 2 actions

Frequency once per day

You have been granted a sliver of the power of the yamaraj, the magistrates of the dead who agreed to allow duskwalkers to exist at all. You exhale a blast of icy wind and ravenous insects. This is a 30-foot cone that deals 14d6 slashing plus 4d6 persistent slashing damage (basic Reflex save using your class or spell DC, whichever is higher). On a critical failure, targets also become Sickened 2.

Pathfinder Lost Omens Ancestry GuideOGL