7. Fume Knight (Dark Souls 2)
He also goes by the name Raime. If you’re a Dark Souls lore fiend, you’ll be well-informed of Raime’s past and how he was banished by King Vendrick. The Fume Knight boss fight is hard enough on its own; the first phase has him dual-wielding his swords, and every strike depletes almost your entire stamina bar even if you’ve got a good shield equipped.
He becomes even more dangerous in the second phase. The Fume Knight wields only one sword here, but he also gains powerful flame AoE attacks that can one-shot you if you lose focus for even a second.
What’s so special about this fight is that Raime can get enraged and jump straight to his second phase at the start of the fight if you wear any piece of Velstadt’s armor. As Velstadt served alongside Raime when they were both under Vendrick’s command, the two were natural rivals. The lore implications here are that Raime is reminded of his rival and his banishment upon seeing Velstadt’s armor, and immediately gets more aggressive when the fight begins.