S10 Exclusive: Key Leveling— The Real Adventure Begins
Following the prologue of Glassbound Spirits, we now enter the true trial arc. This isn't just about NFTs—it's an on-chain contest of strategy, collection, speed, and luck.
Remember the mysterious glass spirits in your hand? That’s just the beginning. The real adventure lies in the bond—and the journey—you forge with your Keys to the Cask.
Following the prologue of Glassbound Spirits, we now enter the true trial arc. This isn't just about NFTs—it's an on-chain contest of strategy, collection, speed, and luck.
🗓️ Event Period: May 23, 17:00 – May 30, 17:00 (UTC+8)
Who will rise as the ultimate Key Master to unlock the golden treasure?
📌 How to Join
1️⃣ Free Mint: Keys to the Cask (1 per wallet only)
Every participant may mint one free Keys to the Cask NFT. This Key is a Soulbound Token (SBT) – non-transferable, non-tradable It starts at Level 0 / Tier 0, and its visual and metadata will auto-update with each upgrade, tracking your progress like a badge of honor!
2️⃣ Level Up Your Key
Burn Glassbound Spirits NFTs to upgrade your Key levels.
Every +5 levels = +1 Tier. Each Tier change will trigger a new Key appearance!
To level up, you must submit a valid burn transaction. Each valid transaction grants +1 Level. A valid transaction must meet both conditions:
✅ Burn a total of 10 Glassbound Spirits NFTs
✅ Include at least 9 different types of spirits (see list below)
⚠️ One valid transaction = upgrade one level, and different transactions cannot be calculated together.
Burning 20 NFTs in one transaction? Still only +1 Level.
Burning 6 in one tx and 4 in another? Neither counts.
3️⃣ Push to Tier 5 and Unlock the Golden Treasure!
Aim for Tier 5, Level 25 to join the treasure pool. All Level and Tier rankings will be updated regularly on our Discord leaderboard.
🍻 Spirits Eligible for Key Leveling (10 Types)
These are the burnable Glassbound Spirits NFTs Types:
| Spirit Type | Supply |
|---|---|
| Limoncello Viva | 424 |
| Calavera Tequila | 424 |
| Lantern Baijiu | 423 |
| Anubrew Wine | 423 |
| Monkbrew Ale | 423 |
| Sangria Olé | 423 |
| Pisco Andesoul | 424 |
| Soju Seoulmate (Rare) | 300 |
| Vodka Nyet (Rare) | 300 |
| Royal Gin (Rarest) | 200 |
| Total | 3,764 |
🚫 Golden Brewmaster cannot be used to upgrade your Key!
It’s far too noble to burn—keep it safe and don’t send it to the fire.
🎁 Reward System
✅ Base Tier Rewards
Rewards are distributed based on your final Tier at the end of the event:
🟫 Tier 1｜Bronzeheart Key — 66 ACS Points
⚪ Tier 2｜Stormsilver Key — 200 ACS Points
🟡 Tier 3｜Sunfire Key — 600 ACS Points
♾️ Tier 4｜Eternal Key — 1,500 ACS Points
💎 Tier 5｜Starbound Key — 1,000 $ASTR (for level 21~24), reaching Level 25 will entry into the 1,000 USDT Treasure Pool 🏆
🏆 1,000 USDT Golden Treasure Pool
First to Tier 5, Level 25 — receives 500 USDT directly!
Remaining 500 USDT — shared equally among other players who reach Tier 5, Level 25.
✨ Birunoko PFP Whitelist Spot Lucky Draw
We will randomly select 20 lucky burners from all participants holding a Tier 1 Key or higher at Snapshot time to receive a Birunoko whitelist spot! Snapshot time: 📷 May 26 at 10:00 (UTC+8)
🧪 Burn Tutorial
How to Burn Glassbound Spirts to level up on Biru website:
- Connect your wallet on Biru, and click the circle in the upper right corner to check your items.
- Choose the Glassbound Spirits collection, and click the + to select the Spirits you want to burn.
- Click “Transfer”.
- Switch the button to burn, and check if the reminder shows checks ✅
If your reminder shows any ❌👇, you still can proceed and burn. But you won't be able to upgrade your key, and the Spirits you burned cannot be back either.
- Confirm the transaction — your Spirits will be permanently burned, and your key will upgrade 1 level✨
⚠️ Burned NFTs cannot be recovered — please make sure to carefully check the rules and reminders before confirming with any burns.
🔥 Your Real Adventure Starts with the Key
Every burn, every level, is a step into the unknown—a transformation of value, effort, and story. This isn't just a level-up system. It's a testament to your role in Web3 experimentation and collectible evolution.
Let your Keys to the Cask rise and unlock your golden destiny.
Good luck on your key leveling journey.✨
About Biru
Biru by Lootex is an independent NFT platform designed for the Soneium ecosystem, seamlessly integrating NFT launches, a marketplace, entertainment events, and community mini-games—all to create a fun, engaging experience for the community.
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