Invulnerability is a broken mechanic, remove it immediately.

Damage is a broken mechanic, remove it immediately.

Riot: "Shit this guy means business, better do what he says."

Invulnerability isn't broken in any way. Unless you continue pumping damage into them while they are invulnerable, in which case it is operator error.

Edit: just remembered: if they are invulnerable, you can still use CC on them sooo...use CC?

Explain why it's broken maybe?

You are one opinion out of millions, and you gave no explanation at all to why you think it's bad.

Kiting and waveclear are also broken, we should we move those too.

Tryndamere - easily kited and cc'd

Kayle - doesn't last very long

Taric - very difficult to time his ult with a 2.5 second delay before activation after pressing R

Care to explain why it's so broken?

Every champ should now have some sort of invincibility, invulnerability, or otherwise death defying ability. Just to make balance with all the champs that do have it along with a full kit besides.