Pretty cool little game!
It may be a bit difficult to figure out what all the items do at the start, but I didn't have a huge problem with it.
I really liked the bidding on when a hero will die feature, there is a lot of room for more mechanics here. Like, if a hero passes a dungeon, they will give you a tip. So you might be incentivized to make them a stronger potion without them knowing, at the cost of having to use more ingredients. Or maybe, being able to spike a potion to be worse, to possibly more accurately predict their demise.
Being able to see the hero's health seemed to be the only key factor when guessing if they would survive. Although, maybe the magic users getting strength was also a useless thing for them to have. Maybe being able to see the dungeon they are going into, or what threats they might face would help with having more accurate predictions.
Artstyle is great, and the music fits the game theme.
Overall a nice game! Was a lot of fun!