Concept for a skillshot-based passive ability

Give a champion great ability scaling, but if any of his/her skillshots reaches the end of its range, he/she pays a large health cost.

They'd pay for missing a skillshot, but not for landing one. And they wouldn't pay if the shot is blocked or shielded.

I don't have anything else as far as the champion concept goes, but I thought it'd be a neat way to justify a champion having strong abilities and actually being able to separate the "good players from the great."