Cloudkill

Source cloudkill

As a move action, you can move the cloud 10 feet in any direction. Add your tier to the spell's level and Hit Dice categories to determine its effect on creatures. (For example, at 3rd tier a creature with 6 or fewer HD gets no save, one with 7–9 HD must save or die, and one with 10 or more HD must save or take 1d4 points of Con damage.)

Augmented (6th): If you expend two uses of mythic power, the spell bypasses the poison immunity of living creatures.