8 Un-Killable Video Game Enemies (You Can Totally Kill)
2. Seath The Scaleless - Dark Souls
Long before encountering him, the player will hear a lot about the mad dragon, Seath the Scaleless, on their journey through Lordran. Born with various deformities and a burning envy of his brothers as a result, he plays a huge part in the dragons' extinction and is awarded dukedom in a secluded research archive of Anor Londo.
His experiments with crystal magic led Seath to the Primordial Crystal, an artefact that essentially bestows immortality onto him by making him a true Undead.
During the first boss encounter with him, then, you are unable to leave a scratch on him at all, and are doomed to be killed and locked away in the dungeon.
Later, when you make it to the centre of the Crystal Cave, Seath will attack you once again. Like last time, he is resistant to all of your attacks, but the difference here is that the Primordial Crystal is within your reach, tucked away at the back of the arena.
Simply destroy it with a single hit, and the paledrake will become mortal once again. I trust you know what to do at this point, Chosen Undead.