Dungeon Reward Chest

Dungeon Reward Chests are loot chests that appear at the end of runs in The Catacombs. They are the source of rewards for defeating Bosses in Dungeons.

Overview

At the end of a Dungeon run, several chests will appear. Three chests will always spawn, with up to three additional chests spawning if players perform exceptionally. Players cannot open chests if they do not reach their 2nd Class Milestone.

Money will be taken from the Purse first before taking money from the Bank. If there is not enough money in the Purse, then players in a Co-op will have their Dungeon chests take away money from their Personal Bank account first. However, if a player does not have enough money in their personal bank, then the chest will take money from the co-op bank instead.

Only one chest can be claimed per Catacombs run, unless a Dungeon Chest Key is used, which allows two to be claimed. Chests can be re-rolled once using a Kismet Feather.

Unclaimed chests can be accessed by speaking to Croesus in the  Dungeon Hub. These only last for 72 hours, and there is a cap of 60 runs.

Chest Types

Chests do not appear in The Catacombs - Entrance. Unlike the Wooden, Gold, and Diamond chests, the additional chests have Dungeon Score requirements. Chest prices vary depending on the floor and the items the chests contain.

The Bedrock chest is only obtainable in Floor V, Floor VI, and Floor VII.

In The Catacombs - Floor VII while in Master Mode, completing the entire run will grant every type of chest, regardless of score. Similarly, failing a run but still reaching The Wither King will grant every type of chest, except the Bedrock Chest, regardless of score.

Chest Rank	Requirements	Base Cost
Chest Rank	Requirements	Floor I	Floor II	Floors III-IV	Floors V-VII
Wooden Chest	Defeat Boss Pass Class Milestone 2	Free
Gold Chest	Defeat Boss Pass Class Milestone 2	25,000 Coins	50,000 Coins	100,000 Coins
Diamond Chest	Defeat Boss Pass Class Milestone 2	50,000 Coins	100,000 Coins	250,000 Coins
Emerald Chest	Defeat Boss Pass Class Milestone 2 Score 230+ (A Rank) or Floor VII Completion	100,000 Coins	250,000 Coins	500,000 Coins
Obsidian Chest	Defeat Boss Pass Class Milestone 2 Score 270+ (S Rank) or Floor VII Completion	250,000 Coins	500,000 Coins	1,000,000 Coins
Bedrock Chest	Defeat Boss Pass Class Milestone 2 Score 300+ (S+ Rank)				2,000,000 Coins

Item Upgrades

Weapons and Armor obtained from chests have a chance to gain different upgrades after being purchased.

Upgrade	Chance
Upgrade	Normal	Master Mode
Rarity Upgrade	1%
Growth VI	1%
Protection VI	1%
1 Star (✪)	10%	20%
2 Stars (✪✪)	5%	10%
3 Stars (✪✪✪)	3%	6%
4 Stars (✪✪✪✪)	2%	4%
5 Stars (✪✪✪✪✪)	1%	2%

Loot Rolling Process

Dungeon Reward Chests are rolled using a system based on two important types of numbers: weight and quality.

When a chest first spawns, a chest quality value is generated for it, based on its loot table's starting quality and various upgrades the player may have. This value acts like a currency, as every item in the loot table also has quality cost.

Each item also has a value called weight, which determines its relative chance to be rolled for out of all eligible items. For example, if the weight of all items adds up to 100, an item with a weight of 10 has a 10% chance to be rolled. Items are not eligible if they've already been rolled or there is not enough leftover quality. Essence entries with non-zero weight and quality can roll multiple times.

Entries will repeatedly roll until there are no more eligible entries leftover. Then, if existent, the Essence entry with 1 quality and 0 weight will repeatedly roll, until all the leftover quality has been depleted. Finally, guaranteed entries will be added, such as Undead Essence, Wither Essence, and sometimes certain Shards.

Any possible rare Dyes and Music Discs roll after these steps are completed.

Chest Quality

Each chest on every floor has a base chest quality. This is used to determine the items the player receives in the chest.

Floor	Wood	Gold	Diamond	Emerald	Obsidian	Bedrock
Floor I	110	160	200	240	300
Floor II	120	170	210	250	320
Floor III	125	180	220	260	330
Floor IV	125	180	220	260	330
Floor V	125	180	220	260	330	370
Floor VI	125	180	220	260	330	370
Floor VII	125	180	220	260	330	370
Floor I (Master Mode)	120	170	215	255	320
Floor II (Master Mode)	130	180	225	265	340
Floor III (Master Mode)	135	195	235	280	350
Floor IV (Master Mode)	135	195	240	280	355
Floor V (Master Mode)	140	195	240	280	355	405
Floor VI (Master Mode)	140	200	245	290	365	410
Floor VII (Master Mode)	140	200	245	290	370	420

Quality Upgrades

Chest quality can be buffed through multiple methods. This can increase the chance for certain items to appear, due to them gaining more opportunities to be rolled.

Upgrade		Bonus	Note
Earning S+		1.05x
Treasure Accessories (Highest Tier)	Treasure Artifact	1.03x	All apply twice
	Treasure Ring	1.02x
	Treasure Talisman	1.01x
Boss Luck Perk		+1/3/5/10
Catacombs Box Attribute		+1-10 (or up to +13 with the buffs below)
Echo of Boxes Attribute		Buffs the Catacombs Box Attribute by 2-20%
Echo of Echoes Attribute		Buffs the Echo of Boxes Attribute by 5-50%

Quality Formula

$InitialQuality = ⌊ BaseChestQuality \times SPlusMultiplier ⌋$ $IntendedQuality = ⌊ (InitialQuality \times T) + B + C ⌉$ $ActualQuality = ⌊ (IntendedQuality \times T) + B + C ⌉$

where:

$T$ = The multiplier from Treasure Talisman, Treasure Ring, or Treasure Artifact
$B$ = The added bonus from the Boss Luck Perk
$C$ = The added bonus from the Catacombs Box Attribute

Note: $⌊ x ⌋$ indicates rounding down, while $⌊ x ⌉$ indicates rounding to the nearest integer ( $.5$ rounded up).

Chest Loot

Master Mode Loot

Bugs

The modifiers for the Treasure Talisman, Treasure Ring, Treasure Artifact, Boss Luck Perk perk and Catacombs Box Attribute all apply twice. This is due to the quality formula running once and being saved to a field, which can be seen in the API when looking at chest data, and then again using that same field as an input.
- This also means the API's chest data shows a different quality value than the actual quality value used to roll the loot.

Gallery

Wood Reward Chest
Gold Reward Chest
Diamond Reward Chest
Emerald Reward Chest
Obsidian Reward Chest
Bedrock Reward Chest

History

SkyBlock Prototype
Jul 7, 2020	0.8	Added Dungeons.
Jan 11, 2021		Added Fuming Potato Book and Recombobulator 3000 to The Catacombs - Floor VII reward chests.
Mar 2, 2022		Added Dark Claymore to The Catacombs - Floor VII Bedrock reward chest.