Okay, so I going to critic item by item:
Spellbook - Imo just simple book. Way too dark pixels inside (under cover and on edge - black lines)
Scythe - really good
Mace - Agreed a bit with Hehemidu, also next time, you could pay more attention to "ball thingy" - not much spiky imo
This armor is OP. You get here such a nice style/structure, fit a lot for lizard or dragon skin. I see same colors/values on both sides. Adding some darker blue purples might give it even more kick!
Blue Shield - Putting both black and white pixels doesn't work here. Shape overall looks okay
Primitive Armor - I like design here, tho you should work on bottom part. Unfortunately, it's not as good as prev armor. Looks kinda flat, but you could easily work on shading . Perhaps more shadows, cast shadows?
Newest Sword - You did a nice step about changing handle.
Looking forward for more! All in all, you are improving. I'm happy, you didn't give up and you post regularly. Remember, if someone is good, he must failed a lot - don't worry about failing/making mistakes - it's way of learning.