Your adventures have exposed you to energies of the multiverse and realms of death. As a result, you can infuse bones with explosive energy. You have energy charges equal to your constitution modifier. To infuse a bone, you must spend energy charges equal to the bone’s size. The size of the bone determines the size of the explosion measured in a radius from a point in space. During the infusion, you can pick from the following damage types: Fire, Force, Piercing, Thunder, and Necrotic. If you infuse a bone of medium size or larger, you can choose more than 1 damage type and assign them to the damage dice. You can activate an explosion with a bonus action so long as you are within 120 feet of an infused bone.  Bones become inert and you regain your energy charges after 24 hours.