Bing Bong for life! You can get a Bing Bong plush online if you want; he's based on a character from Aggro Crab and Landfall's game "Peak". Aggro Crab and Megacrit share an office space. The downside of Bing Bong is that curses will be added to your deck twice, but this is usually overcome by the massive advantage you get out of getting two copies of any good cards your find. It's easy to outscale the game when you find twice as many good Powers, for example, or get two copies of special cards you receive from Ancient Rewards.
All three doll relics are useful for certain decks, but Bing Bong is easily the most transformative. It will double ALL cards you add to the deck, including Curse cards! This is strongest when doubling Power or Exhaust cards, but can also give more value from relics like Fysh. Some decks absolutely want to avoid Bing Bong, so it's usually worth paying 5 hp for two choices here so that you're not stuck with it. Small, cycle-oriented decks should stay away! Daughter of the Wind can be very good with shivs on Silent. If you know you want a specific doll, go for option 3.
You enter a hidden room...
It's packed with an array of dolls. Each are unique, their expressions ranging from joy to sorrow, their attire spanning centuries and realms beyond your own.
A chorus of whispers grows louder and louder until the dolls are shouting over each other and calling for you...
You must choose one and leave immediately.
Examine Each and Make the Best Choice
Lose 15 HP. Choose 1 of 3 Doll Relics.
You examine each and every doll before you make your choice.
The shouting has reached a piercing crescendo but you manage to make a choice before going completely mad!
Pick at Random
Obtain a random Doll Relic.
Take Some Time
Lose 5 HP. Choose 1 of 2 Doll Relics.
Amid the shouting, you quickly examine the dolls.
One of these two may be good?
It's hard to concentrate through the mental anguish.
Daughter Of Wind
“You should be happy I chose you!”
The doll proclaims triumphantly.
Fable
A warm voice happily fills your head.
“We are going to uncover the most delightful stories together!”
Mr Struggles
As you pick up the worn-looking doll, all of the voices go silent.
This one doesn't speak.
Take
Receive Daughter of the Wind, Mr. Struggles or Bing Bong.