How players use it
- Rainbow and Chaos cards: Jack of Rainbows and Jack of Chaos Rainbow cards belong to no king. You get them by beating the Jack of Rainbows (it attacks twice in a standard run), from merchants, from the Gacha building and from tomes such as Diffract. Chaos cards come from the Jack of Chaos, who joins your enemies in Endless mode from year 34. 1.0 has 36 Rainbow cards and 15 Chaos tomes.
How to get it
- Loot after beating the Jack of Rainbows (twice per run).
- Merchants have a chance to stock one; the Lucky perk and Rare Goods decree raise it.
- Gacha at max level, Diffract and the Refraction decree give random Rainbow cards.
Other Jack of Rainbows tomes
Data: 9 Kings 1.0 card table on the official wiki, imported 2026-11-13.