A hacked client with a simple name Infinity gives an excellent opportunity to use cheats in Minecraft 1.12.2 without any problems. When using such a client, it is worth considering its age.
This cheat could certainly be outdated and some servers with anti-cheat protection are able to notice its work. Still, most small servers can be easily compromised using even such a hacked client.
The use of functions like killaura is pretty straightforward here. You just have to activate the desired function in the cheat menu and you can immediately use it. Of course, the cheat menu looks outdated because this client is already many years old.
The player is given a good opportunity to hack the game and use cheats. Do not forget that some functions may not work, therefore this client does not deserve too high marks from our side. Whether or not to use Infiniti is up to you and no one else. Try it and enjoy the game with cheating features!