How to Unlock the 4th Dice Slot in Dicero!! and Clear Chapter 20

To unlock the fourth active dice slot in Dicero!!, you must clear Stage 20 of Chapter 20 in the main campaign. Beating this milestone permanently expands your combat tray capacity from three dice to four, increasing your raw rolling output by 33% and enabling higher-tier poker-style hand combinations.

How to Beat Chapter 20

Stage 20 requires balancing wave clearing with sustained single-target burst to defeat the chapter boss. Stages 1 through 19 test your crowd control against high mob density, while the final stage features a resilient boss with summon mechanics and defensive barriers.

1. Clear Mob Swarms with Splash and Pierce: Prioritize dice that deal area or piercing damage during the early stages. If enemies close in on your perimeter, rely on knockback triggers or slow effects to delay them while your reroll pool resets.
2. Conserve Reroll Tokens in Stages 17 Through 19: Resist the urge to burn reroll charges on standard mob waves right before the finale. You need those charges to force high-tier hands against the boss.
3. Burst Down the Chapter Boss: When the Stage 20 boss deploys defensive barriers, expend your saved rerolls to form your strongest single-target damage combinations immediately. Prolonging the fight risks being overrun by summons and boss enrage mechanics.

How the 4th Dice Slot Changes Combat

Expanding your board from three to four dice lowers the difficulty of triggering advanced hand combinations and allows you to run hybrid team compositions.

Instead of committing all slots exclusively to one status effect like Poison or Bleed, a four-dice tray lets you run three synergy dice alongside an independent utility, defense, or crowd-control die without disrupting your main attack engine.

Next Steps After Unlocking the 4th Slot

Do not proceed directly into Chapter 21 without adjusting your setup. An uncoordinated or underleveled fourth die will dilute your dice pool and reduce your combat efficiency.

• Level the New Slot Immediately: Active slots scale stats directly. Spend accumulated gold and upgrade tokens to bring the newly unlocked fourth slot to parity with your first three slots before starting the next stage.
• Slot a Dedicated Utility Die: If your primary three-dice damage engine is already consistent, use the fourth slot for energy generation, shielding, or debuff removal rather than adding an unrelated attack type.
• Order Dice by Activation Sequence: Dice trigger from left to right. Position armor shredders, debuffers, and status applicators on the left so your heavy burst and finisher dice strike targets that are already weakened.
• Aim for Higher-Tier Hands: Adjust your rolling thresholds during combat. With four dice available, fish for Two Pair and Four of a Kind rather than settling early for basic pairs.