With the Storm Ruler equipped, you’ll want to hold down the L2 button until the sword gets a storm buff. You’ll be able to tell it’s buffed when the storm effect sticks to your sword permanently. Take note that the storm effect will appear once you hit L2, but you have to hold down the button for a while more until the sword gets a short burst of storm energy and makes the effect permanent – that’s how you’ll know it’s buffed.
Once the sword is buffed, continue holding down the L2 button and wait till Yhorm is within your melee range. With the L2 button held down, hit the R1 button to use the Storm Ruler’s weapon art. This will stagger Yhorm and deal about 5000 damage to him. You’ll be using this weapon art for the rest of the fight. Take note that each time you use the weapon art, the storm effect will disappear, and you’ll have to buff the sword with L2 again.
Once Yhorm is down to half health, he’ll imbue his sword with fire, and start dealing fire damage to you. However, his attack patterns do not change. He hits even harder in this phase, but as long as you’re rolling between his legs and staying behind him like you’ve been doing in the first phase, this shouldn’t present too much of a problem. Simply buff the sword each time you manage to get behind him, and then use the weapon art after Yhorm’s next attack. You should be able to take him out after about five uses of the weapon art.
That’s it for Yhorm the Giant in Dark Souls III. For more tips and tricks, be sure to check out our Dark Souls III wiki.
