Your cat starts eating the hairball, and starts gagging involuntarily. Your cat starts to feel sick...
Next fight: poison
Fail CON roll · rare tier
This might just be the worst thing your cat has ever put in your cat's mouth, and there has been a lot!
The hairball is both crunchy and mushy. Your cat thinks your cat might never eat again.
Permanent stats: -1 CON
Loot
DEX check
Pass DEX roll · common tier
Your cat examines the hairball and feels something hard and metal buried inside...
Gain 1 coins
Pass DEX roll · rare tier
The dim light must have tricked your cat!
Your cat stares in awe at the hairball, which is made entirely of gold!
Gain 20 coins
Fail DEX roll · common tier
Your cat picks up the hairball and pulls it apart, trying to wear it as a sweater.
The other cats don't have the heart to tell your cat how absolutely hideous it looks!
Next fight: charisma up (-2)
Fail DEX roll · rare tier
Your cat grabs the hairball and tries putting it on your cat's head like a hat.
Something slimy moves inside it and bites your cat!
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.