One time I started a new account, and instead of fixing my deck first, I pressed the "level 0" button by mistake. I had a starter deck but I figured it would be an easy win since it was only a weak 50HP level 0 opponent.
I had an absolutely horrible starting hand. To my horror, the bad draws just continued to happen, while my opponent was doing solid damage every turn. I had piles of quanta but nothing to spend it on.
I was way below 50% HP when I first played a creature, and amazingly enough I managed to kill the opponent with only 3 HP left, one turn before my own death.
So I almost managed to lost to level 0 while playing at a 100%, without any errors or joking around. Sure I had the started deck, but it was still pretty bad.
I was wondering.. has anyone ever lost to level 0? Before my own experience, I didn't even know it would be possible.