Is it 6 stacks Cho'gath? Is it Gragas? Nope, it's just an extremely fed Soraka mid.
I've been playing Soraka mid for quite some time now, and it is, if not broken, very strong. Maybe I just have low mmr but everyone needs to try Soraka mid. EVERYONE. These bananas are the most fun thing ever. Just take Q and E and you will give the enemy laner their five a day in bananas.