Can they cast parts of themself and lose parts? Can they absorb other parts? How do they behave? What intelligence level do they have? I think you need to add more details and description to this. It's a really cool start of an idea, but I don't think there's enough for a full post.
(p.s. I appreciate that you cite your inspiration. I'm new here so I don't know the etiquette for that, but I think it's important.) Go to Comment
Not bad but needs work. How does it attack? From the statement "each with a varying set of scrolls it has absorbed and can use" I assume it casts the spells on the scrolls that it is made of, but generally scrolls are one-shot items, so as it casts spells, it is going to weaken itself.
As others have said - flesh it out, and I think the votes will go up. Go to Comment
I like this item. It seems fair to me and a nice little curse for people to have to deal with. What if someone in the armor could be turned as well. Maybe they come to a temple to try to get it removed, and the priests turn him. You could torture your players almost comically by having the only people who can help remove the armor perpetually keeping him at bay. ;-p Go to Comment
Chekov's Spell -- This spell has a two-fold effect. The first is to make the target item almost-unnoticeable to anyone not specifically looking for it. The second is that someone who has seen the item will remember it when they encounter a situation that would be perfectly solved by use of said item.