How to Use Trait Rerolls in Brainrot Card Battle

Trait Rerolls are one of the most valuable — and most wasted — resources in Brainrot Card Battle. Codes like REROLL, DELAY2, 50KLIKES, and MEGAROLLS shower accounts with rerolls, while UPDATE3 adds 3 Trait Potions on top of Luck and Boss potions. Used well, rerolls turn a strong card into a deck-defining carry. Used poorly, they disappear on Commons you will replace in an hour.

This guide explains what traits do, when to reroll, and how rerolls fit next to evolution and the Tier List.

What Are Traits?

Traits are passive bonuses attached to individual cards. They can boost damage, improve survivability, or add utility that changes how a card performs in worlds, Tower climbs, and guild content.

Not every trait is equal. A top-tier base card with a weak trait still underperforms in World 8–9 and late Tower floors. That is why rerolls matter once your roster stabilizes.

Trait Rerolls vs Trait Potions

Players often confuse the two items:

• Trait Rerolls — consumed from codes and rewards to randomize a card’s trait.
• Trait Potions — similar reroll currency bundled in newer code waves such as UPDATE3.

Both serve the same goal: improve a keeper card. Redeem every active code on the Codes page before a reroll session so you know your total budget.

High-value reroll sources in July 2026 include:

Source	Reroll value
REROLL code	3 Trait Rerolls
DELAY2	2 Trait Rerolls + 25,000-Roll Pack
50KLIKES	5 Trait Rerolls + potions
5KPLAYERS	2 Trait Rerolls + 5,000 Gold
MEGAROLLS	3 Trait Rerolls + roll packs
UPDATE3	3 Trait Potions + Luck/Boss potions

When to Reroll (and When to Wait)

Reroll only when all of these are true:

1. The card is a long-term keeper from A-tier or S-tier on the Tier List.
2. The card is already evolved or about to be your main invest slot.
3. The current trait clearly hurts the card’s role (glass cannon with heal trait on a DPS, etc.).
4. You are not about to replace the card with a direct upgrade from rolls.

Do not reroll:

• Temporary filler units in early worlds.
• Commons and low Rares you will discard after one good pull.
• Every shiny duplicate before checking tier value.
• Cards you have not tested in auto-battle yet.

Best Candidates for Trait Rerolls

Prioritize rerolls on:

• Bombardiro Crocodilo — maximize AoE output for World 7–9 packs.
• Tralalero Tralala — optimize single-target burst for Tower bosses.
• La Vacca Saturno — strengthen sustain traits for long fights.
• Your primary carry — whichever card wins most clears for your account.

If you are still building your first serious deck, read Getting Started and How to Build a Deck before spending rerolls.

Step-by-Step Reroll Session

1. Redeem active codes (REROLL, UPDATE3, 50KLIKES, DELAY2, MEGAROLLS).
2. Open your roster and mark one keeper card for the session.
3. Confirm the card is evolved and slotted in your main deck.
4. Use rerolls in a focused batch — not one at a time across random units.
5. Stop when the trait supports the card’s role, not when chasing perfect RNG.
6. Test the result in World 7–8 or early Tower before rerolling another card.

Rerolls and Endgame Progression

Trait optimization pays off most in:

• World 8 and World 9 — where stat checks punish weak passives.
• Tower Floor 20+ — longer fights reward efficient traits.
• Guild Raids — consistent DPS and sustain matter more than novelty.

Pair reroll sessions with evolution material farming so you are not upgrading traits on a card you plan to replace.

Mistakes That Waste Rerolls

• Rerolling before evolution — you may replace the card entirely.
• Chasing perfect traits on mid-tier units.
• Burning rerolls during a lucky roll streak when new pulls might obsolete the card.
• Ignoring Updates after patches that rebalance traits or abilities.

Related Pages

• Codes — REROLL, UPDATE3, 50KLIKES, and every active redemption
• How to Evolve Cards — evolve before you reroll
• Tier List — confirm a card is worth keeping
• Guides Hub — full tutorial index