Grief Inkmatas. This is the strongest anyone has seen her so far. Backstory in comments

This (not technically a phase) Phase of Inkmatas was caused after the player killed Switch hood in their battle. She had grieved too hard and had sinned as she had gained Inkstone Sorcery, it is the second strongest magic and only a little bit weaker then the magic that holds Omega Alloy together. Inkmatas in this form is fueled by her grief and rage that she would even harm her loved ones.

In grief form, Inkmatas can easily make quick work of anyone. Her opponents also get a moral drain as they fight her and no one is Invincible to the moral drain.

Should I be scared?

Yes

This form of Inkmatas is her strongest (so far) by a Longshot

Same for final Eggyhead

Well R.i.p Switch hood, will always be in our hearts.