From Pathfinder Core Rulebook, which isn't enabled.

Purple Worm Sting

SPELL 6

Traditions arcane, primal

Cast

Range touch

Targets 1 creature

Defense Fortitude

You replicate the attack of a deadly purple worm. You deal 3d6 piercing damage to the touched creature and afflict it with purple worm venom. The target must attempt a Fortitude save.

Critical Success The target is unaffected.

Success The target takes 3d6 poison damage.

Failure The target is afflicted with purple worm venom at stage 1.

Critical Failure The target is afflicted with purple worm venom at stage 2.

Purple Worm Venom (poison)

Level 11

Maximum Duration 6 rounds.

Stage 1 3d6 poison damage and Enfeebled 2 (1 round)

Stage 2 4d6 poison damage and Enfeebled 2 (1 round)

Stage 3 6d6 poison damage and Enfeebled 2 (1 round).

Pathfinder Core RulebookOGL