It looks like some kind of healing magic XD . Is a technique used to burn "poplar fluff".
Imagine the trees being arranged not in one spot but in a huge ring, and that they drop the fluff fast enough. Then that wave of fire would go on forever. :o
(forever = until the end of the season)
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!