Lava Release: Obsidian Scalpel

The user coats their hand in Lava before applying slight shape transformation to it as it quickly solidifies. Upon tilting their hand, some of the obsidian breaks off, forming a long, super-hard, razor-sharp blade. The blade can easily cut cleanly through a target with next to no effort due to its sharpness. Upon cutting the target, all unused chakra within the closest twenty tenketsu are drained completely, and used to extend the range of the blade, while the heat instilled within the blade cauterizes the cut and any wounds inflicted. Because of its range growth with chakra, it can prove disastrous if the user succeeds in stabbing or even slashing the target. The obsidian blade is sharper than handcrafted blades and even katana, having a smooth edge even on the microscopic level. The blade is sharp and hot enough to slice through steel produced by some forms of the Steel Release kekkei genkai. Through unknown means, the blade is capable of using its heat to purify chakra it absorbs, making it neutral.