Recently played against someone who used stormloch and they put me on SL with just Stormloch.
The strange thing I found about this battle was that every single Sleep put one of my monsters to sleep. That’s even higher chance than potent sleep which was 75% chance if I’m correct. Yet when I played against someone using potent sleep, there were a couple of times it didn’t work.
This person was using normal sleep and it worked every single time.
Regular sleep has a 60% chance. Seems like this guy just got very lucky. 60% is very possible, just ask anyone who’s done the rare eggs.
Everytime you hatch a SE from rare egg, thats like a sleep that worked.
Sounds alot, right? 
Don’t use the rare egg as example… He’ll start thinking that sleep doesn’t exist and the guy was hack_ing
Damn. 10 times in a row. Perfect score. But wow. Didn’t know sleep was 60%. I would have thought much less given the chances it worked for me was more like 3/10!