Burning

While you are burning, you experience the following effects:

• On fire. When you first gain this condition, you gain one Burning die (1d6). At the start of each of your turns, you take fire damage equal to the roll of all your Burning dice.
• Growing Immolation. Each time you gain the Burning condition while already Burning, you add a d6 to the number of dice that your roll for damage.
• Spreading flame. If you inflict the Grappled condition onto another creature, or a creature grapples you, that creature also gains your Burning dice until the grapple ends or if the condition is removed. That creature takes fire damage at the start of each of its turns and once when it first comes into physical contact.
• Extinguish. You or a creature within 5 feet can use an action to extinguish the flames, doing so reduces the number of Burning die by 1, ending the Burning condition if there are 0 Burning dice. Submersion in water or similar effects removes 5 Burning dice.

Immolation

The following ways can apply the burning condition.

• Standing in fire. If a creature stands in a 5 by 5 space that contains a large enough and unprotected fire source, such as a bonfire, burning tree, or wildfire, the creature must succeed on a DC 8 Dexterity save or be affected by the Burning condition.
  • DC 8 for small fires; DC 10–15 for large or intense fires, at the DM’s discretion.
• Massive Damage. If a creature takes more fire damage than the ability score asked for the saving throw, or greater than their AC if it's from an attack, then they are affected by the Burning condition.