I'm thinking about making some custom armor for the campaign I'm currently playing in.
What I want to achieve with this armor is this: completely impervious to magical or supernatural attacks. I'm thinking something along the lines of imbuing the armor with Antimagic Field. Completely negate weapon enhancements and magic against the wearer but without the wearer having to be wearing a constant Antimagic Field (or maybe so). I've been told that the campaign is planned for around 23-25 levels.
How do I go about doing that? I know talks with the DM would be involved, but as for the item itself, what would be an appropriate CL, DC, etc for all of this? Even going so far as to never be able to put enhancements on this armor?