Magic Lantern LOCKED not an Adobe product

Hello Everyone.

I have Bunch of DSLRs, such as Canon 80D,90D,5d MarkVI. None of these cameras have Peaking, Zebra. and other features. I heard If I install Magic Lantern you can have Peaking and other Video Features. Also, I heard this Installation can Damage your Camera Is that True?

Thank you very much.