15 Most Toughest Bosses In The Dark Souls Series

10. Blue Smelter Demon – Dark Souls 2: Iron King DLC

As an ode to the Smelter Demon of yore, Blue Smelter Demon arrives to beat down anyone that thinks they can predict him. First off, his attacks are mostly magic-based, thus necessitating armour with high magic defense. When you get his patterns down, Blue Smelter Demon has the ability to actually delay his attacks, thus screwing up your timing. Oh yeah, and he hurts a lot, even when you block so using Havel’s Shield is pretty much necessary.