Bonemass boss fight environment effects is a fx item in Valheim. Its in-game item ID is _eventzone_bonemass, which you can drop into the console with spawn _eventzone_bonemass to give yourself one — append a number like spawn _eventzone_bonemass 50 to spawn a stack. Bonemass boss-fight environment effects are the internal eventzone that applies poison-fog visuals during the Bonemass encounter. It is not a player item. The spawn command requires cheats — enable them with devcommands after opening the console.
Spawns one Bonemass boss fight environment effects at your location.
Spawns one Bonemass boss fight environment effects at your location.
Spawns five Bonemass boss fight environment effects at your location.
Spawns twenty Bonemass boss fight environment effects at your location.
Bonemass boss-fight environment effects are the internal eventzone that applies poison-fog visuals during the Bonemass encounter. It is not a player item.