Sanguine Noble enemies from Elden Ring appear as Bosses inside Blood Ruins. Do not immediately attack this boss, as the nearby Putrid Corpse enemies will run to you and explode nearby, dealing damage and causing Bleed.
The Sanguine Noble can use Blood incantations and attack with their dagger, but after dealing with other enemies, they become an easy fight due to their low poise, allowing players to stagger them repeatedly.