Once you take her down to half health, she’ll gain access to another sword. The Dancer will no longer perform the grab attack in this phase, but her sword attacks become much more dangerous, and she also becomes a lot more aggressive. Be sure to watch out for her spinning attack as she uses both blades to literally dance around the room in a spiral. The good news is, she won’t home in on you with this attack, and you can dodge out of it pretty easily. However, if you get caught in it, she’ll deplete your stamina bar very quickly if you’re blocking with a shield. And since this spiral attack contains about eight or nine swings, getting caught in the sweep will very likely spell instant death for you.
She also has a new move where she positions both blades on the ground and swings them upwards in a long arc. You can either block this attack, or roll into her to avoid it. Other than that, the Dancer retains her moves from the first phase. She’ll still drag her sword on the ground, do an AoE, and execute broad slashes. The hardest part of this fight is stopping yourself from getting greedy and avoiding getting caught in any of her attack strings. Take this fight very slowly and safely, don’t make any risky moves, and you’ll eventually beat the Dancer of the Boreal Valley.
Be sure to check out our Dark Souls III wiki for more tips and tricks.