From Pathfinder Impossible Magic, which isn't enabled.

Inscribed Blast

FEAT 5

Activity reaction

Trigger A creature or object adjacent to you damages you.

Requirements Your inscribed runes are currently intact.

Some of the patterning on your exterior covering is not just decorative but is instead a set of runes. The triggering creature or object takes (1 + (your level ÷ 5, rounded down))d4 force damage and your inscribed runes fade. You re-inscribe your runes each day during your daily preparations. At 10th level and every 5 levels thereafter, the damage increases by 1d4.

Enhancement You can re-inscribe your runes with 10 minutes of work as an exploration activity.

Pathfinder Impossible MagicORC