Inscryption

Much like Act II, you will be sequistered to the right side of the map until you defeat one of the two bosses (The Archivist and The Photographer). The Archivist is located in the same general area the Grimora battle was in Act II (bottom right). You will need to complete a few regular card battles to make your way to the boss gate and will not be able to access the boss room until you obtain the quill from a room to the right of the gate.  It is important to know there is a missable trophy that you should prepare for by looking at Agonizing Remorse , otherwise you will need to repeat this boss fight in chapter select post-game.

The Archivist will have an attack ready to go as soon as you put down your first Empty Vessel, sending three identical cards down the line at you - Librarians, with 1 Power, 2 Health, Mighty Leap  and Dead Byte  Sigils.

That last item, the Dead Byte Sigil, is the gimmick of the battle. When you attack the Librarians, you will be asked for permission to access the hard drive. For the PlayStation version, you will not be actually granting access to the hard drive (the PC version did access your actual files) so you will be utilizing Luke's files on a C: and D: drive. The idea is that you choose how much damage you will inflict by the weight and size of the file you select.

I would suggest you head to the D: drive > LuckyCarder > Recordings. There are a few files in here ranging from 1 GB to 800 MB, as well as an additional file in the DontLookInHere folder that is 2 GB.  If you can keep the scale balanced enough without taking too much damage during the battle, two to three large files should be enough to end the round in your favor.

In Round Two, you will be asked to pick a file at the start that is precious and old. Luke happens to have some old photos of his sister that work well for this, but you can pick any file you want if you are going to go for the Agonizing Remorse  trophy.  Head to C: drive > Users > Luke > Documents > Photos > luke&el.jpeg. This will create a card depicting a file holding a gun to its head with a Power of 4 and a Health of 4. You can play this card (it will have a energy cost of 2) and immediately destroy it with the hammer for the missable trophy, or keep it as an offensive strike to assist in ending the round quickly.

Whichever cards you use for the second round, it should end without too many more surprises and you will have this trophy, 

An example of my experience with the boss battle can be seen at the end of Agonizing Remorse