Practice mode Give enemy champion infinite health

Hi Riot! I'm sure this idea sounds insane but hear me out. Sometimes when you're practicing combo's you need a moving target, not a target that's staying still. I would like to suggest a "Invulnerable" enemy champion option, so that way we may spam our combo's endlessly w/o having to wait for their respawn timer. Thanks!

Edit: By infinite Health, I mean I want to see their health bar drop, but Once they reach 1hp their health resets to 100%