[@ArenaSnow]

The ring was to hold back his strength because he never cared to to take precautions on the battlefield. He would let his strength run wild and if he killed his own people, then sucks for them. The ring puts it in check. The necklace allows him to alter his physical form. That's it. He was going to try and build trust, that was his idea. However, now that 3 members of the group know/suspect he is a demon, there is no point in keeping the necklace, might just have him tear it off and crush it when he gets back and on the way power is going to be obtained, he might as well cast off the ring and forget about because he will need to physically keep up with the mastery knowledge of magic everyone else will obtain. 

Also, changing your form isn't high level magic. The poly-morph spell from d&d for example only requires you be level 4. All depend on what you are trying to reference.