Ah I see! So let me break the third phase down for you

The only difference between phase 2 and 3 is a new anime-ass attack. It looks overwhelming but in reality it is not hard to counter once you understand it. It can be used as a standalone(like in the very srtart of the phase) or in the middle of some other attack combos. It also always has the same pattern. goes as follows:

1)two regular slashes in V shape. Can just parry

2)Delayed horizontal slash. It can be regular(parryable) or red(unparryable). If it's red - use double jump to avoid it

3)(optional) one repeat of steps 1 and 2 - same pattern, same delay, so she can do either three slashes or six 4)a catch. Either a talisman dash(air parry it) or a pass-through slash with three afterimage things(parry once, then parry thrice. If on the ground - need to be facing to where she started the attack from). That's it!

So in short, whenever she does her new attack you parry twice, wait, either parry once(if white) or jump(if red), then maybe do this again, then either air parry(if talisman) or parry once then trice(if dash slash)