Iudex Gundyr Dark Souls III Guide
Last update: 11 May 2016
To begin the fight, approach the boss and pull the sword out. Start attacking him before he gets up. During the first phase, the boss will attack mainly using his weapon by swinging it or performing jump attacks. Watch out for the long range of his attacks and the speed with which he performs them. Try to avoid hits by rolling. You can also try to block some of the attacks using a shield, but if you fail, you will receive a lot of damage. Rolls are safer.
The second part of the fight will start when the boss's HP bar is brought to a half. He will transform, obtaining a huge head and claws. Now is the perfect time to use Firebombs, because the boss is vulnerable to fire.
Watch out for the "diving" attacks, when Iudex Gundyr's head will try to hammer you into the ground. Don't try to block the attacks, just perform dodges. During this phase, the opponent is slower and his attacks are signalized more clearly. As a melee fighter, try to stay close to the boss and attack quickly. Rotate with the enemy. This way, you should be able to avoid most of his ranged attacks and dodge melee attacks if needed. If you're a ranged fighter, run around the arena and cast spells or throw Firebombs (remember that the boss can jump - the best way is to throw a bomb right after he lands).
To sum up: during the first phase, you can block some of the hits, but remember to dodge. A good strategy is to get away from the enemy and make him jump towards you. Dodging in the right moment will allow you to blow several strikes before he gets up. During the second phase, use Firebombs, try to stay close to the enemy and attack his back.
Location: Cemetery of Ash
Reward: Curved sword, 3000 souls