Aldrich, Devourer of Gods is the third Lord of Cinder you’ll face in Dark Souls III. When the fight first starts, I recommend making a mad dash straight for him at the end of the room. If you’re too far from him, he’ll summon two magic spears and launch them at you, and these can hit you even if you’re standing behind pillars. These hit for a lot of damage, so if he does this attack, your best bet is to roll through them. Aldrich usually uses the spear attack at the start of the fight, but you can avoid this by running straight at him and forcing him to use his relatively less dangerous attacks.
During the first phase, he can summon smaller magic projectiles that will hover around for a while before homing in on you. These don’t deal a lot of damage, and you can avoid them by rolling out of the way. Aldrich also has an attack where he swings his halberd in a wide arc in front of him. This hits very hard, but you won’t be hit by it if you’re either behind him, or very close to him. He also has a move where he shoots moonlight arrows in the air – this move is easily recognized as he will stop what he’s doing and aim his bow upwards. When the arrows start raining down on you, be sure to stop what you’re doing and run. The arrows will stop after a while, and you’ll be able to start attacking again.