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From Pathfinder #160: Assault on Hunting Lodge Seven, which isn't enabled.

Linnorm Sting

SPELL 9
UNCOMMONCONCENTRATEFIREMANIPULATEPOISON
Traditions arcane, primal
Cast
Range touch
Targets 1 creature
Defense Fortitude

You replicate the fiery venom of the tor linnorm and inflict an enemy with the dread dragon's debilitating bite. You deal 2d12 piercing damage to the targeted creature and afflict it with tor linnorm venom. If the target takes piercing damage, they must attempt a Fortitude save.

Critical Success The target is unaffected.

Success The target takes 8d6 fire damage.

Failure The target is afflicted with Tor Linnorm Venom at stage 1.

Critical Failure The target is afflicted with tor linnorm venom at stage 2.

Tor Linnorm Venom (fire, injury, poison) Level 17

Maximum Duration 10 rounds
Stage 1 8d6 fire damage and Drained 1 (1 round)
Stage 2 12d6 fire damage and Drained 2 (1 round)
Pathfinder #160: Assault on Hunting Lodge SevenOGL