See also: Slime (Liquid), Earth Damage, and Poisoned
You see poison gas.
Location
Can be found anywhere outside of Protection Zones, but more common in swampy areas.
Notes
By stepping on one of these you will take 5 earth damage and get the Poisoned special condition for 100 hitpoints (totaling 105 damage). The poisoned condition ticks for 4 turns of 5 damage, 5 turns of 4 damage, 7 turns of 3 damage, 10 turns of 2 damage, and 19 rounds of 1 damage. Its effects can be cured by the Antidote spell or Antidote Runes, and the gas can be removed by using a Destroy Field Rune on it.
Looks the same as Plant Poison.