The Endless Curtain, introduced in Update 19 as the Infinity Castle, is a solo mode where the player climbs endless floors for rewards. It can be accessed with jjk castle, and progress resets every season.
If the player loses, they retry the same floor, and manual fights have a 15 second cooldown. Hard Mode clears 2 floors per win and gives the rewards for both, but the enemies are harder.
Starting from Floor 50, elements get ATK buffs and nerfs. From Floor 55 some elements are banned, from Floor 65 some rarities are banned, and from Floor 200 enemies have modifiers.
Auto fights use charges, and the player can hold up to 20, gaining 1 charge every 2 pull resets. Standard, Deluxe and Ultimate Edition start each season with 5, 8 and 12 charges, and gain 1, 2 and 3 more per pull reset.
| Modifier | Effect |
|---|---|
| Shielded | Has shields to break before HP can drop |
| Solid | Crits deal only base damage |
| Hardened | Only takes damage from Crits |
| Overgrowth | Restores 3% Max HP each turn |
| Iron Skin | Damage Reduction cannot be lowered or ignored |
| Executioner | +40% damage to targets below 30% HP |
| Unyielding | Survives the first fatal hit on 1 HP |
| Overloaded | Crits deal 50% more damage |
| Leeching | Heals for 10% of damage dealt |
| Last Breath | Deals more damage as its HP falls |
| Predator's Mark | +25% damage to your highest HP card |
| Backlash | Reflects 20% of damage dealt |
As of Update 41, the player earns the following rewards this season:
At the end of every season, the top 3 players are given a title: Castle Champion, Castle Contender and Castle Challenger. The ranks go as the following:
| Tier | Rank |
|---|---|
| 99.99% - 100% | Grandmaster |
| 99.90% - 99.98% | Master |
| 99.00% - 99.89% | Expert |
| 75.00% - 98.99% | Adept |
| 50.00% - 74.99% | Disciple |
| 0.00% - 49.99% | Initiate |
The shop can be accessed with jjk shop. Limits reset every season.
| Item | Price | Limit |
|---|---|---|
| +50 Card Limit | 11 | |
| 10 | ||
| 20 | ||
| 50 |