Arcana Heart 3

Even know this achievement says without assistance, you can use Arcana, and I noticed when it says after the achievement is unlock, it says without arcana instead of assistance, but this is all lies, this achievement is possible with an Arcana.

Although, the max you're ever gonna get with a normal character is 99 hits, and I did get over 100 one time, but that was because I accidentally did her super move, then did the arcana blaze, so that way mustn't work as the achievement didn't pop up for me.

First of all, you have to choose Weiss in Story Mode, on Normal settings, this way you can select whatever arcana you want, without it being choose automatically on you.

Choose the metal arcana.

Now go all the way up in Story mode, until you're in the battle against Ragnarok.

Press ABC at the beginning of the battle, then use 236ABC which will cause Arcana Blaze to start, this move should do 800+ hits in a single combo, this is more than enough what's needed, if for whatever reason this didn't unlock for you, have Ragnarok defeat you and try again.

It may help if you try to do this as quick as possible, as I have now attempted this on two accounts, both unlocked first time, this is because I stayed in the starting area and did it as soon as the battle started.

(Video has been took down by YouTube user, so if anyone has any visual help, please comment with the link of the video on this guide)