While travelling, your cat finds a locket. It appears to be in decent condition.
Safest choice
OpenLCK checkNo bad outcomes
ExamineINT checkWorst: Gain disorder Deep Cut (Fail INT roll · rare tier)
IgnoreNo rollNever rolls, nothing bad
Open
LCK check
Pass LCK roll · common tier
Your cat flips open the locket to find a picture of an unfamiliar face looking back at your cat.
The original owner must have cared about them, but it's useless to your cat.
Nothing else happens.
Pass LCK roll · rare tier
Your cat opens the locket and stares at the oddly familiar face within.
Your cat knows that your cat has never met them, but perhaps your cat will?
Your cat tries to open the locket, but try as your cat might, it remains clamped shut. Oh, well.
Nothing else happens.
Fail LCK roll · rare tier
Your cat attempts to open the locket, but just ends up breaking it instead!
Permanent stats: -2 LCK
Examine
INT check
Pass INT roll · common tier
After closer examination, your cat discovers it is made of gold!
Gain 4–8 coins
Pass INT roll · rare tier
Looking closely at the locket, your cat discovers a hidden compartment on the back! Your cat pops it open!
Get a random item from isaac items
Fail INT roll · common tier
After close inspection, the locket appears to be useless. Your cat tosses it away.
Nothing else happens.
Fail INT roll · rare tier
As your cat inspects the locket, a small shard of the metal breaks off into the flesh of your cat's paw!
Your cat tries to pull it out but it is stuck fast.
Exact where the game's data defines the odds (no-roll choices, fixed chances, weighted pools). Stat checks, the common/rare split and luck-weighted picks depend on rolls the data doesn't spell out, so they're labelled instead of guessed.