Joker mode in 9 Kings, the custom deck builder
- Updated
- Game version
- 1.0
- Topic
- Modes
The Joker unlocks when all nine kings are unlocked. It is a sandbox mode rather than a tenth king: you build your own 9-card deck and set the run’s rules.
Settings
| Setting | What it changes |
|---|---|
| Deck | Pick any 9 cards for your deck, the way each king has 9 |
| Events | Turn calendar events off |
| Enemy kings | Choose who you fight |
| Gold | Starting gold |
| Lives | Starting lives |
| Re-rolls | Starting re-rolls |
The screenshot shows the deck slots in a 3×3 grid and the card pool split by king, with a Rainbow page.
Uses
- Test an interaction before relying on it. For example, put a Lab Rat between two Concabulators to see how a level-up chain resolves, or check what Amplifier passes on from each support building.
- Practise a king’s deck against a chosen enemy. Pick the enemy whose cards you want as loot.
- Rainbow cards on demand. The Rainbow page in the deck builder lets you try cards that a normal run offers only after a Jack of Rainbows fight or from a merchant.
Not to be confused with
- Daily mayhem: a random daily quest with a fixed custom deck, decrees and conditions, unlocked by beating all 81 quests. See Quest mode.
- Jack of Rainbows and Jack of Chaos: opponent armies, not playable characters. See Rainbow and Chaos cards.
Sources
- 9 Kings 1.0 release notes, The JokerUnlock condition and the settings: deck, events, enemy kings, gold, lives, re-rolls.
- 9 Kings game data, Kings table (official wiki import)Joker unlock text "Unlock all other kings".
Related
How to unlock every king in 9 KingsUnlock goals for all nine kings and the Joker in 9 Kings 1.0, from Use 9 spells to Play for 999 years, plus how to unlock Quest mode, multiplayer, daily mayhem and higher difficulties.
What changed in 9 Kings 1.0Everything 9 Kings 1.0 added or changed on 12 November 2026 compared with Early Access 0.9.8 - Joker mode, daily mayhem, 9 Rainbow cards, 27 decrees, perks, blessings, 45 achievements and balance changes.
Rainbow and Chaos cards: Jack of Rainbows and Jack of ChaosHow to get the 36 Rainbow cards and 15 Chaos cards in 9 Kings 1.0, when the Jack of Rainbows and Jack of Chaos attack, and what each special card does.
Level-up chains: Lab Rat, Concabulator and OverhaulHow King of Progress level-up chains work in 9 Kings 1.0: Lab Rats that level with their neighbours, the level-3 Concabulator, Overhaul scaling, Patronage, X-Ray and Mantra.