What's the point of being lucky?
In Binding of Isaac: Rebirth, luck has been made a visible stat. (It was present in the original game, but not shown on the stat screen, unless I just totally missed it). However, even with 2 or 3 points of luck, I still find myself gulping down random pills which have a negative effect such as stat downs. (This could of course be confirmation bias). I've also not noticed much other impact of being lucky.
So if being lucky doesn't seem to impact things like pills and the stuff I get from beggars etc., what's it good for? There are items which specifically increase your luck such as the Lucky Foot, so it must do something.
Solution 1:
According to the Gamepedia BoI:Rebirth wiki, luck will:
- Increase the chance of drops after clearing a room.
- Increase the chance of random tear effects (teeth, poison, fear, infatuation, slow,..) happening.
- Increase the payout rate of slot machine and shell game
Some random oriented things luck does not have an effect on:
- Luck does not increase the payout rate of other beggars (coin/heart/key)
- Luck does not affect the fortune teller or portable slots.
- Luck does not change the contents of chests, other objects that spawn drops (mushrooms, skulls, etc), angel/devil rooms
- Luck does not increase the trigger chance of Gimpy, Fanny Pack, Dry Baby, Mulligan, Broken Watch, Infamy, or Guppy's Collar.