Aguni is undoubtedly the hardest Boss in the game. He has four attacks; a downward spiral that explodes into big pillars of fire, three smaller fire pillars, a swoop attack, and repeated slashes with his claws. To evade his attacks, keep as far away as possible, or extremely close to a wall. When he swoops past or comes to swipe at you, duck underneath and slide inward. His pillar attacks can be dodged by jumping, and often open up for easy hits with a heavy weapon (for example, Great Axe or Mjollnjr). Some helpful Souls that can be used include: familiars, Corpseweed, Barbariccia and Erinys.