The Sorrow
The Sorrow is less of a boss, to be honest, and more of a storytelling device/gimmick. In Metal Gear Solid 3: Snake Eater, he floats in front of you as you wade up a river while ghosts of past enemies reach out and try to grab you. It’s really not a “fight” in any way, shape, or form, but you can still take damage – and, in fact, you have to in order to progress. Dying allows you to take a revival pill, which is the only way to move forward in the game. Here’s blood in your eye!