Inf Stamina PC AND INVICTUS REX ONLY BY AOSHI

I copied the running animation from the Invictus Rex (rbxassetid://116194318450051) and set it to play whenever you hold down the "shift" key. In other words, it's not a great infinite stamina, but it's not bad either. In future updates (if there are any) I'll add sprint speed as well. I put the script as Open Source because it's simple and easy to do. 💎 Anyone can modify it without giving credits 💎 (Sorry for the "messy" script)