While charging an enemy that bumps into this will be stabbed it the chest. The charge refills to 100 percent when enemy is collided and is forced to charge again. multiple enemys can be stuck to the knife until if you dont collide again you will stop charging and run out of charge. The current enemies on the knife will stop taking damage and will be set free. While charging and an enemy is stuck on your knife you can click to knock back all your current enemies to possibly die from fall or gernade damage.