Looks like @MouSkxy must be busy, I will still let him answer your ACTUAL question,[quote=“CybRiver, post:19, topic:5865”]
explain what having Icemans repo does?
[/quote]
as he is far more knowledgeable than I.
But for context, Iceman is to Proxmark what @amal is to biohacking.
His Repo is the Gold standard, and what most, if not all professionals with a Proxmark Run
If you have the 
then grab yourself a Proxmark3 RDV4 with DT LF antenna
If you want to save some money, grab the almost as capable PM3 Easy
@anon2520759 found a good one, see below
So you will just need to learn a few commands, and you will be set!