The Great Rift guide for Chaos Zero Nightmare (CZN). See how to unlock, boss, mechanics, F2P best team, Meta rank builds, Vanguard, Rearguard, high scores, and leaderboard rewards.
Table of Contents
The Great Rift Schedule
First Half Is Ongoing
| First Half | 12/03/2025 – 12/23/2025 17:59 (UTC +0) |
|---|---|
| Second Half | 12/24/2025 – 01/13/2026 17:59 (UTC +0) |
The Great Rift runs in two phases this season, with the First Half currently ongoing.
Galactic Disaster Season WalkthroughThe Great Rift Boss
Suppressed Servant

| Weakness | Order |
|---|
| Thought Coalescence |
|---|
| This monster summon Scratchers at the start of the turn, and when a Scratcher is defeated, Though Debris will be decreased and a Thought Piece Card will be creased in Discard Pile. If you are unable to remove al Thought Debris within a set amount of turns, the Thought Piece Card will transform into a Thought Card that applies a harmful effect. If you are able to remove all Thought Debris, the Remaining Thoughts Card that gives you positive effects will fill your entire hand, so attacking the summoned monster with cards that target all enemies will be in your favor. |
| Weakness | Void |
|---|
| Thought Fragement |
|---|
| For the duration while the effects of Though Debris are active on this monster, when attacked, decreases the amount of Though Debris and creates a Thought Piece Card in the Discard Pile. If you are unable to completely remove all stacks of Thought Debris in a set amount of turns, all Thought Piece Cards will be change into Thought Cards that inflict harmful effects and fill the entire hand with those changed cards. If you are able to remove all stacks of Thought Debris in time, your hand will be filled with newly created Thought Fragment Cards that weaken the monster, so it will be in your favor to attack the monster consecutively and use the Thought Fragment Cards to weaken them. |
Amplify Effects

| Stage Modifiers |
|---|
| Increase Damage Amount of Order and Void Cards by 50% Increase Damage Amount of cards that carry Inspiration by 50% Increase Damage Amount of All-Target Attacks by 50% At the start of battle, increase Max HP by 100% The Rearguard will gain score equal to 300% of Recover Amount. The Rearguard will gain score equal to 300% of Damage Amount blocked by Shield. Score will increase by 100% if the Rearguard is able to perfectly block Damage with Shield. You will gain Combat Score based on the Damage Amount, and once you reach a certain threshold of damage, the score you receive in this manner will gradually be reduced. |
The Great Rift Best Teams
Vanguard Team
Yuki, Hugo, and Luke form a strong Vanguard core. Their synergy is exceptional, combining Order, AoE, and Inspiration bonuses to clear Scratchers quickly and maximize damage multipliers.
Rearguard Team
This team composition excels at rapid enemy clearing, effective threat management, and high score generation, which are needed in the Great Rift challenge.
Substitute Characters
| Character | Recommendation |
|---|---|
Chizuru | - Fast single-target DPS with high burst potential - Excels at exploiting enemy weaknesses for bonus damage - Can chain attacks efficiently, making her strong for boss fights |
Veronica | - Consistent damage with Ballista cards - Has AoE attacks that can help clear Scratchers - Can be used as a draw engine to improve hand consistency and reduce the risk of dead draws |
Mei Lin | - High single-target burst DPS for bosses - Self-sustaining with AP reduction and card draw - Reduces enemy defenses and applies debuffs |
Rei | - Buffs allies’ damage for sustained DPS -Maintains hand rotation and prevents dead draws - Enhances team consistency and attack chains |
Nia | - Provides defensive support and shields - Can provide Inspiration boosts or damage mitigation - Useful for keeping the team alive in longer encounters |
Beryl | - Strong AoE attacks to help clear Scratchers and waves - Can deal extra damage to targets weak to Void or Order - Good crowd control option |
Orlea | - Great at removing and managing Thought Debris stacks - Buffs allies or debuffs enemies to maximize overall damage - Essential for keeping the team stable in long battles |
You can use the characters listed above as replacements. Even if they don’t share the same attributes, they still benefit from other aspects of the Amplify Effects.
Best Party & Team CompositionsThe Great Rift Rewards
Record Reward
| Goal | Rewards |
|---|---|
| Reach a Best Record of 20,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x25,000 |
| Reach a Best Record of 25,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x25,000 |
| Reach a Best Record of 40,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x25,000 |
| Reach a Best Record of 60,000 or higher | Crystals x50 Pure White Fragments x200 Unit x35,000 |
| Reach a Best Record of 80,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x35,000 |
| Reach a Best Record of 100,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x35,000 |
| Reach a Best Record of 200,000 or higher | Sticker x1 Crystals x50 Pure White Fragments x200 Unit x35,000 |
| Reach a Best Record of 300,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x45,000 |
| Reach a Best Record of 400,000 or higher | Traces of Memory x30 Pure White Fragments x200 Unit x45,000 |
| Reach a Best Record of 500,000 or higher | Sticker x1 Crystals x50 Pure White Fragments x200 Unit x60,000 |
You can obtain Record Rewards based on the highest score you achieve within the limited number of turns.
Weekly Cumulative Rewards
| Goal | Rewards |
|---|---|
| Achieve a cumulative score of at least 100,000 or higher | Crystals x60 Pure White Fragments x1,000 Traces of Memory x50 Unit x80,000 |
| Achieve a cumulative score of at least 200,000 or higher | Crystals x60 Pure White Fragments x1,000 Traces of Memory x50 Unit x80,000 |
| Achieve a cumulative score of at least 300,000 or higher | Crystals x70 Pure White Fragments x1,000 Traces of Memory x50 Unit x80,000 |
| Achieve a cumulative score of at least 500,000 or higher | Crystals x80 Pure White Fragments x1,000 Traces of Memory x50 Unit x80,000 |
Cumulative Rewards reset every week.
You can obtain Weekly Cumulative Rewards based on the total score you accumulate over the week.
The Great Rift Merit Ranking
Ranked by Best Record

Merit Ranking is a competitive leaderboard system that measures a player’s performance based on their highest score achieved in the Great Rift. It highlights the top 1,000 players, showcasing those who achieve the greatest accomplishments each season.
Merit Ranking Mechanics
- Merit rankings are determined based on the highest record achieved in the Great Rift.
- Merit rankings are displayed up to Rank 1,000.
- Merit rankings are calculated separately for the first half and second half of the season, and are reset at the end of the first half.
- If multiple players achieve the same highest record, the final ranking is determined first by higher difficulty, then by the earlier achievement date.
- Your rank is determined by the Merit Ranking you achieve.
The Great Rift Tier Ranks
| Emblem | Rank Tier |
|---|---|
![]() | Master (Top 1%) |
![]() | Diamond (Top 3%) |
![]() | Platinum (Top 10%) |
![]() | Gold (Top 30%) |
![]() | Silver (Top 50%) |
![]() | Bronze (Top 100%) |
The Great Rift ranks players based on performance, allowing you to see where you stand relative to others in the season. The tiers are divided by percentile, rewarding top performers with prestigious ranks and recognition.
View Leaderboard

You can view the leaderboard at any time by selecting the Merit Ranking button in the top-right corner, allowing you to track your rank, compare your progress with other players, and see how close you are to reaching higher tiers.
How to Play The Great Rift
Unlock Chapter 2 Episode 7

The Great Rift becomes available once you clear Chapter 2, Episode 7 in the Galactic Disaster Season Event.
Galactic Disaster Season 1 Forbidden CatalystChoose Level of Difficulty

When entering the Great Rift, you can select a difficulty level. Currently, there are four difficulty levels available: Easy for beginners, Normal for a balanced challenge, Hard for experienced players seeking a tougher battle, and Hell for top-tier players aiming for maximum rewards.
Two Teams Required

In the Great Rift, you must form two teams to battle powerful bosses. The Vanguard Team attacks first, followed by the Rearguard Team. Keep in mind that your ranking is determined by the total damage dealt by both teams.
Total of 15 Turns

Each team can only act for a limited number of turns, and the battle ends once the turn limit is reached.
The Great Rift Reset Times
Weekly Cumulative Rewards reset every Sunday at 18:00 (UTC). All Record Rewards and Weekly Cumulative Rewards are reset at the end of the first half.
Daily Reset TimeWhat is The Great Rift?

The Great Rift is a special game mode in the Galactic Disaster seasonal event where you build your own deck to achieve the highest score.
Galactic Disaster SeasonChaos Zero Nightmare Related Guides
