For the achievement ,,Spiral Bookmark" you have to clear all of Margarets challenges which are 25 in total.
For Challenges like 22#,23# and 24#, I strongly recommend doing them in a corner or it will whiff at some point of the Combo.
Now 1-24 are all described with button inputs while the last(25) is designed to reach over 6000 damage with your own thought combo.
The problem here is you dont really know how to do them or even watch the demonstration unless you beaten the named challenge.
However here is my Solution i gatherd from collecting inputs to master this challenge
standard-keyinput:
! I recommend doing this combo in the corner. !
5C, j.2C, j.214A, OMB, 2C, 2D, 236236+AB~214214+AB
Here is the optional visual-input:
(mid air)
(mid air)
+
~
+
Hope this helps and good luck.