[Mewni]

I mean, spar etiquette doesn't even matter, last i checked you can just use any potions that isn't a healing one, so Cleanse/Crash/Anti-Tox all you want in a spar, its not part of any etiquette to avoid that...if someone complains you got'em with a cleanse, just shrug it off as salt, because it's definitely not something like popping a Pr-Hi

And yeah, only issue i really see on it is the level being too beefy, someone would need to spirit themselves only on curses to have it even be LVL 4. And that gives you a potential 2x damage risk.