A new idea about awesome support skill

I have a new idea to share w/ you. We can create a support skill like this: Cast on OWN : Invisible own for 7 seconds Cast on ** a teammate champion**: Invisible both own and ur teammate for 4 seconds and having a 20 Armor & Magic Resist buff We can change those variables, I am just give out some suggested value. It can save ADC if he is in danger, but I think this skill can't be too OP, so WE should let somethings like Q can be make them visible again. It can be developed as a champion skill or a summoner spell. Comment if u like it or u think something needs to be improved.