Icons causing special effects in game is prety cool. Can we get some more?

I just stumbled upon this yesterday when playing URF. A darius player had killed the vel'koz I was laning with and a beam of red energy shot down from the sky and looked as though an evil version of leona had gotten godly powers and decided to smite him. I was like, "Um vel.....what just happened to you?" For a little bit I thought URF somehow encorporated doombots into the mode and my champion was one of the ones not using crazy stuff. I later found out that the effect was actually caused by the summoner icon the darius player was using. In the next match A jinx was using the heart explosion icon and it just matched awesomely whenever she killed someone with her ult.

So let me get to my point here. I think the icons causing in game effects to happen is pretty cool and was seriously fun for me. I even went so far as to purchase the orbital strike one so I could use it whenever I felt like playing leona and nuking people with my ult. I want riot to make more of these and hopefully make them as an all year long type thing and not just to have for a certain mode or anything. It would be pretty great to have all sorts of icons that offer different effects in game.

What kinds of special effect would you guys like? and what would the icons be for them? What would you like Riot to make?