New Jungle Juggernaut
So imagine a new champion who's a hulking Colassus like Nautilus with a play style like Singed, and is completely centered around a rhythm. Your charges and skills would be coordinated to a beat, and the better you keep the tempo the stronger your kit becomes. If you can keep the rhythm going even through the thick of a fight you'll be rewarded with more damage and durability, and going off beat will give a serious power cut. I was thinking the champion would have a jungle theme, and be made of wood or stone covered in vines and moss and what not. The sounds themselves would be like bongos and jungle drums to keep the theme strong. Or you could even incorporate different 'stances' and other tempos so you would always be predictable and repetitive