new skill ideas (as in champion kit)

Here are my ideas: A shield which can be set on allied as well as enemy champions which blocks a flat amount of damage. So if set on enemy and they auto attack or use an ability targeted beyond the shield the shield would suck up the damage and stop it, if its a projectile. the shield will consume a flat amount of damage and then disappear. If set on allied it is a simple shield sucking up damage however not blocking anything from your ally. Another idea which is a Hemispherical Yasuo wall (a Hemisphere is a 3D circle, also called sphere, cut in half) only the wall would also block allied projectiles. I imagine its radius being something between Maokai ult and Ekko w.

If you like these ideas up-vote so maybe some rioter will see and obviously any feedback is helpful