pf2e.fyi
From Pathfinder #181: Zombie Feast, which isn't enabled.

Swallow Light

SPELL 2
Traditions arcane, divine, occult
Cast
Range 30 feet
Area 15-foot cone
Targets 1 magical light effect
Defense basic Reflex
Duration 1 minute

You draw magical light into your open mouth, consuming it and turning its essence into fuel for a gout of life-draining shadows. Attempt a counteract check against the light effect. If you successfully counteract it, you gain a breath weapon of chilling shadows you can use until the spell ends. Exhaling the breath is a two-action activity. The breath weapon is a 15-foot cone and deals 1d6 cold damage plus 1d6 void damage. Creatures in the area can attempt a basic Reflex save against your spell DC. Once activated, you can't use the breath weapon again for 1d4 rounds.


Heightened (+2) Increase the damage of the breath weapon by 1d6 cold damage and 1d6 void damage.
Pathfinder #181: Zombie FeastOGL