Your own adapter.You can use them with your own adapter or do they have to be equipped with MagicDock?
These are AC units, just like what you would use at home, and Tesla doesn't equip then with adapters.
Unlike destination chargers, Superchargers are DC units, and with any Tesla DC Supercharger you have access to, you'll need a different (DC) adapter, if it's not equipped with Magic Dock.
The Tesla to CCS DC adapters are built to handle much higher voltage and current, and also shunt the connection to the two CCS pins on our i3s, so they are larger, heavier, more robustly built with greater built in protections, and as such cost more.