Starts to burn a target. On every further hit of a fire tower, the target will receive more bonus damage then before. Burning Structures will increase the bonus damage by 2.5, any other fire towers by 0.75. If the unit dies, it explodes and deals 277 damage to nearby units in a range of 200. Lasts 5 seconds after the last attack of a fire tower.
Level Bonus: + 0.25 damage gain (Burning Structrues) + 0.08 damage gain (Other fire towers) + 0.12 seconds burn duration
Burn 
