1. Download and install the WoW 3.3.5a client from the link above.
2. Navigate to your WoW installation folder and open the Data/enUS/realmlist.wtf file (or Data/enGB/realmlist.wtf depending on client language).
3. Replace the contents with:
set realmlist butters.pw
4. Save the file and launch WoW.exe (not the launcher).
5. Log in with your account created here 🎮