Sacrificial Stone(Bonemass) is a other item in Valheim. Its in-game item ID is BossStone_Bonemass, which you can drop into the console with spawn BossStone_Bonemass to give yourself one — append a number like spawn BossStone_Bonemass 50 to spawn a stack. Bonemass's Sacrificial Stone is the Forsaken Altar in the Swamp where Bonemass is summoned. Placing ten Withered bones on the stone summons the third boss; after the kill, the Bonemass trophy can be hung here to claim his Forsaken power. The spawn command requires cheats — enable them with devcommands after opening the console.
Spawns one Sacrificial Stone(Bonemass) at your location.
Spawns one Sacrificial Stone(Bonemass) at your location.
Spawns five Sacrificial Stone(Bonemass) at your location.
Spawns twenty Sacrificial Stone(Bonemass) at your location.
Bonemass's Sacrificial Stone is the Forsaken Altar in the Swamp where Bonemass is summoned. Placing ten Withered bones on the stone summons the third boss; after the kill, the Bonemass trophy can be hung here to claim his Forsaken power.