A bank of heavy yellowish green, poisonous fog rises up, slaying weak targets within the cloud while inflicting on stronger targets 1 to 4 Constitution damage and 2 to 12 acid damage plus an additional 1 acid damage for every caster level up to caster level 20. Successful Fortitude saves reduces the Constitution and Acid damage by half. This fog obscures sight, giving all creatures in the fog concealment (attackers have 20% miss chance). Creatures immune to poison are undamaged by this spell.

D&D Dice Deals 1d4 Con damage and 2d6 acid damage plus 1 damage per caster level (max 20).