The new League of Legends patch (1.42.34) added in a "Kill Stream" (as well as a lot of other neat UI cleanups. It looks very pretty now, but I digress...) in addition to the announcements of "So and so has slain such and such" etc.
There appear to be at least three separate kill icons - A blue fireball, a yellow sword, pointing downwards, and a red sword, pointed right.
What do each of these kill icons represent?



