Gilded Key

Gilded Key is an unlockable trinket added in The Binding of Isaac: Repentance.

Effects

Replaces all new chests with Golden Chests.
- Old Chests and Mega Chests are not replaced.
Causes Golden Chests to either grant an item or multiple random pickups. This modifies the contents of Golden Chests to be able to give one or even multiple cards, runes, and trinkets from a single chest alongside normal pickups when it doesn't reward an item.
- This includes one or more Lil' Battery and pill pickups allowing Golden Chests to drop these pickups.
Gives Isaac one Key when picked up for the first time.

Reward	% Chance	Gilded Key
1 Item	20%	20%
2-6 Random Pickups (see table below)	58%	80%
1 Trinket	10%	0%
1 Chest	1%	0%
1 Locked Chest	1%	0%
1 Card or Rune	10%	0%

Reward	Base %	Gilded Key	Gilded Key + Daemon's Tail
1-3 Coins	35%	25%	29.7%
1 Heart	20%	20%	4%
1 Key	15%	10%	11.9%
1 Bomb	30%	20%	23.8%
1 Pill	0%	5%	5.9%
1 Card or Rune	0%	5%	5.9%
1 Rune	0%	5%	5.9%
1 Trinket	0%	5%	5.9%
1 Lil' Battery	0%	5%	5.9%

The contents of Golden Chests can be changed retroactively by picking up/dropping Gilded Key. This can even be observed if Isaac has Guppy's Eye, allowing him to see what the chest would have if he did(n't) have the key and choose which payout he wants.
- This also applies to chests that use Golden Chests' loot systems, such as Bomb Chests and Eternal Chests.
- Mega Chests will also have their contents modified if they didn't contain items.
- The difference in contents between the two chest payouts are independent from each other; regardless of if the original chest had an item, card, trinket, or pickups, the modified chest can have any combination of them.
  - Modified chests are still unable to spawn pickups alongside items.
Gilded Key does not retroactively change chests that have already spawned into Golden Chests, or change their contents.
Golden Chests in Chest will still spawn items.
The unique Red Chests in the beginning room of the Dark Room will be replaced with golden chests, allowing Isaac to take 4 treasure room items for free instead of Devil Deal items.

Paper Clip: Allows all Golden Chests spawned to be opened without a key.
Sharp Key: Enemies killed by keys will only give the contents of locked chests allowing items to be obtained through Sharp Key more consistently. The pickups they can drop will also include runes and Batteries.

Gilded Key is the only trinket in the game to grant a consumable upon pickup.
The pickup text "Less is more" is a reference to Mom's Key's old pickup text "less is now more +2 keys"