You create a
weapon of which you are proficient, made of bone and sinew. If this weapon requires ammunition, mundane bone ammunition is created when you reload it. You can have only one weapon created this way at a time; if you create another, the original falls apart. If you are not holding the weapon at the end of your turn, the weapon falls apart. The weapon improves to a striking weapon if you’re 10th level, a +2 weapon at 12th level, a greater striking weapon at 16th level, or a +3 weapon at 19th level.You can destroy an adjacent thrall as part of using this action. If you do, the weapon also gains a
rune, or the rune if you’re 15th level or higher.