Deadly Hazard (Levels 5–10) or Nuisance Hazard (Levels 11–16)
Whenever an uncontrolled fire spreads, it can create an inferno that quickly engulfs creatures, objects, and vegetation.
An inferno consists of at least four contiguous 10-foot Cubes of fire. Each of the inferno’s 10-foot Cubes can be doused with 10 gallons of water. Exposure to a strong wind for 1 minute causes the inferno to grow, adding 1d4 new 10-foot Cubes to its volume. An inferno deprived of fuel burns itself out after 1d10 minutes.
An inferno damages any vegetation or object that isn’t being worn or carried that it touches, dealing 22 (4d10) Fire damage immediately and again at the end of each minute. Any creature that enters the inferno for the first time on a turn or starts its turn there takes 22 (4d10) Fire damage and is burning.