Master yi changes

Was thinking about it today after having a master yi destroy us in a game wouldn't it be kinda cool if he was a health based champ rather than using mana i mean his Q and E could do % of his max health as cost and his E would be a no cost to elevate the cost of the other two abilities. His ult could drain hp per second for X amount of seconds's. Just thought it would give him some variables on how to build/ play This way would make him a sort of like a double edge sword. What do you guys think?