
How to Get Unknown Crystals in 7DS Grand Cross? In The Seven Deadly Sins: Grand Cross, Unknown Crystals are essential for upgrading characters and enhancing their stats. These rare materials can be challenging to obtain, making knowing the best strategies to farm them efficiently crucial.
Whether you are a beginner or a seasoned player, understanding the different methods to acquire Unknown Crystals will help you progress faster in the game. There are multiple ways to obtain Unknown Crystals, including daily login rewards, event participation, clearing boss fights, completing missions, and earning arena rewards.
Table of Contents
Event Participation

Events in 7DS Grand Cross are an excellent way to farm Unknown Crystals, especially limited-time events that offer exclusive rewards. Participating in special in-game events, seasonal festivals, and collaborations often provide generous rewards, including Unknown Crystals.
Some events require you to complete specific challenges, such as defeating bosses, collecting tokens, or completing missions. These activities make the game more engaging and ensure a steady supply of essential upgrade materials.
Guild events, cooperative missions, and mini-games within seasonal events also provide a great way to earn more rewards. Participating in these events consistently will help you gather many Unknown Crystals while enjoying fresh and exciting gameplay experiences.
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Daily Login Rewards
- Consistent Daily Logins
Logging in daily is one of the simplest ways to collect Unknown Crystals. Even if you don’t play extensively, claiming login rewards ensures a steady supply over time.
- Special Event Logins
The game often provides extra Unknown Crystals during special events as celebration rewards. Make sure to check the event calendar regularly.
- Monthly Accumulated Login Bonuses
Some login rewards accumulate over a month. Players who log in consecutively for multiple days can receive better rewards, including Unknown Crystals.
- Daily Mission Rewards
Completing simple daily tasks like upgrading gear, fighting in the arena, or using stamina will grant daily rewards, sometimes including Unknown Crystals.
- VIP and Premium Login Perks
If you have purchased a premium pass or VIP membership, you may gain access to exclusive login rewards, including additional Unknown Crystals.
Clearing Boss Fights
- Demon Boss Battles
Defeating high-level demon bosses can yield Unknown Crystals as a reward, especially if you complete them on higher difficulties.
- Final Boss Battles
The Final Boss event is an excellent opportunity to farm high-value rewards. Unknown Crystals are often included in the ranking rewards.
- Tower of Trials
Progressing through the Tower of Trials can earn you various rare materials, including Unknown Crystals, at certain milestones.
- Limited-Time Raid Bosses
Occasionally, the game introduces extraordinary raid bosses. Beating these bosses often rewards exclusive items, including Unknown Crystals.
- Guild Boss Challenges
Joining a guild and participating in guild boss fights allows you to earn additional rewards, including Unknown Crystals, based on your performance.
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Completing Missions

- Story Mode Quests
Many main story quests provide Unknown Crystal as rewards upon completion. Progressing through the storyline ensures a steady supply.
- Side Missions
Various side missions in the game also offer Unknown Crystals, so don’t overlook them while focusing on the main quests.
- Weekly Challenges
Completing weekly challenge missions can grant a significant amount of Unknown Crystals, helping you accumulate them over time.
- Achievement Milestones
Reaching specific achievements in the game, such as character upgrades and PVP victories, can provide Unknown Crystals as rewards.
- Special Event Missions
Special events often introduce limited-time missions that yield great rewards, including Unknown Crystals, upon completion.
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Arena Rewards
- PvP Ranking Rewards
Higher ranks in the arena grant better rewards, and Unknown Crystals are often included in top-tier prizes.
- Weekly PvP Season Rewards
At the end of each PvP season, players receive rewards based on their rankings, with Unknown Crystals available in higher reward tiers.
- Participation Bonuses
Even if you don’t reach the highest rankings, participating in PvP battles can earn small amounts of Unknown Crystals over time.
- PvP Event Rewards
Special PvP tournaments or time-limited battle events occasionally offer Unknown Crystals as exclusive prizes.
- Guild PvP Battles
Engaging in guild vs. guild battles can provide additional rewards, including Unknown Crystals when your team performs well.
Trading with Other Players
- Understanding the Trading System
Learn how the in-game trading mechanics work, including the rules, restrictions, and items to exchange for Unknown Crystals.
- 2. Building a Reliable Network
Connect with active players who are willing to trade resources. Join communities, forums, or Discord servers to find trustworthy partners.
- Offering Valuable Items
Trade rare or high-demand items like SSR gear, awakening materials, or event-exclusive resources to secure Unknown Crystals.
- Negotiating Fair Deals
Ensure both parties benefit from the trade by negotiating fair terms and avoiding scams or one-sided agreements.
- Utilizing Trading Events
Participate in special trading events or festivals that offer bonus rewards or reduced trading costs for Unknown Crystals.
Using Gems for Crystals
- Converting Gems to Crystals
Use your hard-earned gems to purchase Unknown Crystals directly from the in-game shop or through special bundles.
- Maximizing Gem Efficiency
Save gems during events or promotions that offer discounted rates or bonus crystals for every purchase.
- Completing Gem Challenges
Earn free gems by completing daily missions, achievements, or PvP battles, then convert them into Unknown Crystals.
- Investing in Value Packs
Purchase value packs or subscription services that provide a steady supply of gems and crystals over time.
- Avoiding Impulse Spending
Plan your gem usage carefully to ensure you have enough resources for essential upgrades and purchases.
Special Promotions
- Event-Based Rewards
Participate in limited-time events that reward Unknown Crystals for completing specific tasks or challenges.
- Login Bonuses and Milestones
Claim daily login rewards or milestone achievements that include Unknown Crystals as part of the prize pool.
- Seasonal and Holiday Offers
Take advantage of seasonal promotions, such as anniversary events or holiday sales, to earn bonus crystals.
- Collaboration Events
Engage in crossover events with franchises, often offering exclusive rewards like Unknown Crystals.
- Social Media Campaigns
Follow the game’s official social media channels for giveaways, contests, or codes that reward Unknown Crystals.
Joining Guilds
- Benefits of Guild Membership
Guilds provide access to exclusive quests, rewards, and trading opportunities that can help you earn Unknown Crystals.
- Participating in Guild Activities
Contribute to guild events, raids, or battles to earn guild coins, which can be exchanged for Unknown Crystals.
- Guild Shop Perks
Use guild coins to purchase Unknown Crystals directly from the guild shop or unlock special bundles.
- Building Strong Alliances
Form alliances with high-level guild members who can guide you or share resources to help you progress faster.
- Climbing the Guild Ranks
Aim for higher guild ranks to unlock better rewards, including more significant quantities of Unknown Crystals.
Limited-Time Offers

- Flash Sales and Discounts
Keep an eye on the in-game shop for flash sales or discounted offers that include Unknown Crystals.
- Time-Limited Bundles
Purchase bundles that combine Unknown Crystals with other valuable resources like gems, gold, or stamina.
- Exclusive Packs
Invest in exclusive packs available only during special events or updates, which often include Unknown Crystals.
- Battle Pass Rewards
Complete battle pass tiers to earn Unknown Crystals as part of the reward system.
- Limited-Time Quests
Complete time-sensitive quests or missions that reward Unknown Crystals upon successful completion.
FAQs
What are Unknown Crystals used for in 7DS Grand Cross?
Unknown Crystals are essential upgrade materials used to enhance characters and equipment. They help players strengthen their heroes, making them more effective in battles. These crystals are especially valuable for upgrading high-tier units and maximizing their potential in PvE and PvP modes.
What is the fastest way to get Unknown Crystals?
The fastest way to get Unknown Crystals is by participating in daily login rewards, completing event challenges, and clearing high-difficulty boss fights. Additionally, exchanging gems or purchasing limited-time offers in the shop can help speed up the process of obtaining these rare materials.
Can I buy Unknown Crystals in the game?
Yes, you can purchase Unknown Crystals through in-game special promotions, bundle packs, or by exchanging gems in the shop. Some limited-time events also offer these crystals as exclusive rewards, so keeping an eye on updates and sales can be beneficial.
Do Guilds provide Unknown Crystals as rewards?
Yes, joining an active Guild can help you earn Unknown Crystals through Guild Wars, special Guild missions, and collective achievements. Guild-exclusive rewards and participation bonuses often include these materials, making teamwork a great way to accumulate them over time.
Are there free ways to farm Unknown Crystals?
Yes, players can earn Unknown Crystals for free by completing daily missions, participating in arena battles, and clearing high-level boss fights. Additionally, event participation and login rewards frequently provide these crystals without requiring any in-game purchases.
Conclusion
Unknown Crystals are essential for progressing in the 7DS Grand Cross, and acquiring them requires strategy, resource management, and active participation in the game’s various systems. By trading with other players, using gems wisely, taking advantage of special promotions, joining guilds, and leveraging limited-time offers, you can steadily build your stockpile of Unknown Crystals.
Remember to stay informed about upcoming events and updates, as these often provide the best opportunities to earn this valuable resource. With patience and persistence, you’ll be able to unlock the full potential of your characters and dominate the world of 7DS Grand Cross.