uncommon necromancy poison 

Traditions arcane, occult

Cast [>>] somatic, verbal

Range touch; Targets 1 creature

Saving Throw Fortitude

You use the power of nightmares to magically replicate the venomous attack of the aberrant and cunning Leng spiders. You deal 2d6 piercing damage to the touched creature and afflict it with Leng spider venom. If the target takes piercing damage, they must attempt a Fortitude save.

Critical Success The target is unaffected.Success The target takes 2d6 poison damage.Failure The target is afflicted with Leng spider venom at stage 1.Critical Failure The target is afflicted with Leng spider venom at stage 2. Leng Spider Venom (incapacitation, poison) Level 13; Maximum Duration 6 rounds; Stage 1 2d6 poison damage and drained 1 (1 round); Stage 2 3d6 poison damage and drained 2 (1 round); Stage 3 4d6 poison damage, drained 2, and confused (1 round)

AoE4, page 80.