The Ultron, great kit, I am however surprised you didn’t go for an xG3? Magicians would have a great number of “tricks up their sleeves” So to speak. ( Unless you already have one /some)
I am going to try and keep this pretty basic for you, If you want / need more info, just ask.
Very quickly
So lets call what you are talking about LF or 125kHz or xEM
Programming wise, you may or may not need to, also if you do, you have a couple of options
Not Need To: If what you are interacting with is LF, and it is EM mode and you own it, you can probably just enroll it into the equipment
Need to If what you are interacting with is LF, but it is in another mode eg. indala or HID you will need to change the mode to match ( Programming )
Tools Generally if you need to change your xEM to HID mode, you could PROBABLY get away with a Blue cloner ( I could expand, but lets keep it simple, so Search the forum for things to be aware of ) if you need any other modes, you will probably need a Proxmark ( Easy $60 or RDV4 $300 )
Things to consider, with your Ulton Kit, It is awesome, and this is hindsight, but for Magic I would have recommended for you a flex device, The reason being is for the extended range. so your interaction will be more hands off, with your current implants you with likely need to touch what you are interacting with.
Your phone and NFC will obviously give you some options, but with some lock I will suggest you could build props around them, but a FLEX will give you some better effects.
these are spring loaded, they do some LF versions but HF are more abundent
The HF ones I think are compatible with the HF - xNT side of your NExT, I have a couple but they are at work so I don’t have access to them, and I haven’t tried to enroll them…
These are also spring loaded but not as strong, these are normally LF and also EM so you will be able to enroll directly without a programmer
For more examples, just search your usual online shopping stores, Amazon, eBay, aliexpress.
The Vivokey Spark 2 is capable of the same as the NExTs - xNT and more.
So for your purposes of Magic, it would replicate what the xNT does, with a slight twist.
I assume you have downloaded the Vivokey App ( Android only currently )
For more info this is where you want to go
https://www.vivokey.com/
And the forum to read through ( which you can use to login to with your Spark2 and this forum also BTW - INSTRUCTIONS)
https://members.vivokey.com/
That should hopefully give you some good building blocks, and when you get your head around it, come back and ask for more info we can attempt to expand for you