Originally Posted by
HiImKyle
Could probably use Cheat Engine for it, I'm not sure if that would reflect in-game considering its set every update, then again I'm useless with CE... If you know what you're doing when it comes to editing it directly within the game's code it's at Terraria.Player.luck - there is also a NormalizedLuck property within the Player object that you might want to look at too, that's clamped to -1/1 so it never exceeds those. The game sets a players luck at Terraria.Player.RecalculateLuck(), you'd want to edit this method most likely, which is called by the player update method.
Even if you did change it, servers might not** keep the change. Just depends on if the server is checking for abnormal luck.