You would be hard pressed to block or “brick” an implant. I’ve never seen one truly unrecoverable because the user was messing around. Here’s an idea of the minimum and maximum level tools for each type of implant.
High Frequency
- Min
- Smartphone: not all NFC antennas are created equal. Check this thread
- Max
- ACR122U: USB card reader, great antenna performance. Need to use a program like NFC Tools desktop. There are many knock-offs with poor performance, so be wary
- Proxmark3: High barrier to entry, but this is the one of the best tools for this type of tag manipulation. Need to hook up the included HF antenna.
Low Frequency
- Min
- Chinese Cloners: These will get the job done, but you have to be very careful about “tearing” of the data due to poor coupling. See this thread
- Max