You are much better off ordering a Proxmark3 Easy from Dangerous Things. They have the Iceman version of the code pre installed. Some versions have less memory, not so with the Dangerous Things one.
A “Magic” card is one which explicitly allows you to change the UID. Dangerous Things sells implants, but the XM1, FlexMN, FlexMT, and FlexM1 all contain “Magic” chips. You should read this post about Magic chips.