death necromancy poison 

Traditions arcane, primal

Cast [>>>] material, somatic, verbal

Range 120 feet; Area 20-foot burst

Saving Throw basic Fortitude; Duration 1 minute

You conjure a poisonous fog. This functions as obscuring mist, except the area moves 10 feet away from you each round. You deal 6d8 poison damage to each breathing creature that starts its turn in the spell's area. You can Dismiss the spell.

Heightened (+1) The damage increases by 1d8.

Core Rulebook, page 324.