Every time you step on a fire field you will receive 20 fire damage. You will then be burning and receive 10 fire damage over 7 turns, each 9 seconds. For a total of 90 health lost in 1 minute.
This field spell is useful as a secondary attack rune that helps speed up killing players and monsters. This fire field also provides more light if compared to the other field spells. Quite useful as this field rune provides the most damage for a single hit but it takes long for all the damage to kick in, if you want fast damage use Energy Field.
The first stage of the fire field lasts 3:20; the second stage lasts for 2:28; the last stage (that does not block a monster) lasts 1:38. Total time that a fire field will block a monster is 5:48.