Random Device

This device is a collar that goes around the neck. It's very advanced from space itself, it was founded in a forest and found by you, so you now own it and it sees you as its new owner/master. It can do so much stuff with a simple command, like changing your height, growth, muscle mass, agility, sensitivity, making new parts onto your body, making non-living into living, and so much more. Also, there's no limit on how far it can go. But this only works on the person wearing it, and the changes stay the same unless you tell the collar to reset or change it. It also has an AI built into the front of the collar and so it can respond to you if you asked it to talk. And the fact that you can change it's personally. And you found it, it belongs to you and it recognized it's master is only you.