Eclipse Chill

Feats

For up to 3 rounds per day, the Lich can imbue all spells they cast with the powers of the eclipse chill. Creatures affected by such spells must succeed at a Fortitude saving throw (DC = 10 + half the Lich's character level + their mythic rank + their highest ability modifier) or become blinded and suffer (2d8 + mythic rank) cold damage, becoming vulnerable to cold and negative energy until the end of combat.

Eclipse Chill — Feats | Pathfinder: WotR Database