Sol's RNG features 8 unique biomes that dramatically change your gameplay experience and offer exclusive auras with spawn rates ranging from common to ultra-rare. Each biome has specific spawn chances, durations, and unique items that can boost your luck and roll speed.
| Biome Name | Spawn Chance | Duration | Exclusive Auras | Special Item |
|---|---|---|---|---|
| Normal | Default | Permanent | None | None |
| Sand Storm | 1/3,000 per second | 11 minutes | 4 auras | Hour Glass |
| Hell | 1/6,666 per second | 11 minutes | 4 auras | Eternal Flame |
| Starfall | 1/7,500 per second | 10 minutes | 11 auras | Piece of Star |
| Corruption | 1/9,000 per second | 11 minutes | 5 auras | Curruptaine |
| Null | 1/10,100 per second | 1m 39s | 3 auras | Null |
| Dreamspace | 1/5,000,000 per second | 2m 8s | 4 auras | Heavenly Potion |
| Glitched | 1/30,000 per second | 2m 44s | 3 auras | None |
Biomes in Sol's RNG aren't just cosmetic changes – they're fundamental gameplay mechanics that can make or break your aura hunting success. The biome system operates similarly to the rolling system, with each biome having a specific chance to spawn every second. When a biome appears, you'll receive a chat notification, giving you precious time to prepare your rolling strategy.
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Most biome-exclusive auras can also be obtained outside their native biome through the Breakthrough (BT) system. This means you can still get rare auras even when the specific biome isn't active, though at significantly reduced rates. Each biome has a multiplier that affects aura rarity:
For example, rolling an Atlas aura during Sandstorm has a 1/90,000,000 chance, but outside this biome, the chance increases to 1/360,000,000.
The Normal biome is Sol's RNG's default environment. While it doesn't offer any exclusive auras or special items, it's where you'll spend most of your time between biome events. This biome serves as the baseline environment and automatically returns when other biomes expire.
Strategy: Use Normal biome time to prepare for rare biome events. Stock up on potions, organize your inventory, and position yourself near rolling areas to maximize efficiency when the next biome spawns.
Exclusive Auras:
Special Item: Hour Glass (can be offered to Grail of Resonance for +3% Luck and +1.5% Roll Speed, or used for Strange Controller crafting)
Expert Strategy: Sand Storm offers some of the best common-to-rare aura ratios in the game. Focus on rolling for Gilded and Jackpot early in the biome duration, as they have relatively high drop rates. Save your fastest rolling methods for the last few minutes when attempting Atlas, as it's one of the rarest non-limited auras in the game.
Exclusive Auras:
Special Item: Eternal Flame (Grail offering: +5% Luck and +2.5% Roll Speed, or used for Strange Controller crafting)
Expert Strategy: Hell biome provides the best luck boost when offering its special item to the Grail. The Undead aura has one of the highest drop rates among biome-exclusive auras, making Hell biome excellent for consistent rare aura farming. Use the Eternal Flame early to maximize your luck bonus throughout the entire biome duration.
Exclusive Auras:
Special Item: Piece of Star (Grail offering or Strange Controller crafting) Bonus Effect: Stella's Star has a 1/20 (5%) chance to spawn instead of regular potions and coins
Expert Strategy: Starfall biome offers the most diverse selection of exclusive auras in the game. Focus on the common auras (Starlight and Star Rider) first, then work your way up the rarity ladder. The Stella's Star bonus makes this biome excellent for potion farming. Save your fastest rolling methods for attempting the ultra-rare Gargantua aura in the final minutes.
Exclusive Auras:
Special Item: Curruptaine (Grail offering: boosts Luck & Roll Speed, or used for Strange Controller crafting)
Expert Strategy: Corruption biome strikes a perfect balance between spawn rate and duration. The Hazard and Corrosive auras have excellent drop rates for biome exclusives, making this biome reliable for rare aura farming. Use the Curruptaine item early to maximize your rolling efficiency throughout the biome's duration.
Exclusive Auras:
Special Item: Null (Grail offering or Strange Controller crafting)
Expert Strategy: Null biome has the shortest duration of all regular biomes, making every second count. With its 1000x breakthrough multiplier, auras obtained here have significantly higher breakthrough chances outside the biome. Prepare your fastest rolling methods in advance and be ready to roll immediately when the notification appears. The Undefined aura has one of the highest drop rates among biome exclusives.
Exclusive Auras:
Special Item: Heavenly Potion (3% chance to spawn every 10 seconds)
Expert Strategy: Dreamspace is the second-rarest biome in Sol's RNG but offers some of the highest drop rates for exclusive auras. The Pink Star series has exceptionally good odds compared to other biome exclusives. However, the Dreammetric aura is one of the rarest in the entire game. Focus on collecting Pink Star variants first, then attempt Dreammetric if you have time. The Heavenly Potion spawns frequently, so prioritize collecting these valuable items.
Exclusive Auras:
Special Effect: Unlocks the "???" achievement Special Item: None (unique biome effect instead)
Expert Strategy: As the rarest biome in Sol's RNG, Glitched biome events are extremely special occasions. The Fault aura has a relatively good drop rate for such a rare biome. Focus on rolling for Fault and Glitch auras, as Oppression is nearly impossible to obtain. The corrupted GUI effects and achievement make this biome more of a prestige event than a practical farming opportunity.
Beyond the main biomes, Sol's RNG features three weather systems that offer additional exclusive auras:
Certain biome and weather combinations can create powerful stacking effects. For example, rolling during both Hell biome and Rainy weather combines their respective multipliers, potentially increasing your chances for certain auras.
Always offer biome-specific items to the Grail of Resonance immediately when a biome spawns. The luck and roll speed bonuses compound over time and significantly impact your rolling efficiency.
Before expecting rare biomes like Dreamspace or Glitched:
Stay connected with the Sol's RNG community for the latest updates, strategies, and biome notifications:
The Glitched Biome is the rarest with a 1/30,000 per second spawn chance, followed closely by Dreamspace at 1/5,000,000 per second.
Yes! Most biome-exclusive auras can be obtained through the Breakthrough system, though at significantly reduced rates (typically 4x to 1000x rarer depending on the biome).
Biome durations vary widely:
Hell biome offers the best balance of spawn rate (1/6,666), duration (11 minutes), and aura quality. The Undead aura has a relatively high 1/2,000 drop rate, and the Eternal Flame provides the best luck boost when offered to the Grail.
No, biome-specific items like Hour Glass, Eternal Flame, and Piece of Star don't expire. However, their Grail offering bonuses only apply while their respective biome is active.
Unfortunately, biome spawn rates are fixed and cannot be increased. However, you can:
Biomes are major environmental changes with unique visuals, longer durations, and multiple exclusive auras. Weather systems are shorter, more frequent events with fewer exclusive auras but higher spawn rates.
No, only one biome or weather can be active at a time. When a new biome spawns, it immediately replaces the current one.
Mastering Sol's RNG biomes is essential for collecting the rarest and most prestigious auras in the game. From the common Sand Storm biome to the ultra-rare Glitched biome, each offers unique opportunities and challenges. Remember that patience and preparation are key – rare biomes can take hours or even days to spawn, but the rewards are worth the wait.
Stay active in the community, keep your inventory prepared, and always be ready to roll when the next biome notification appears. With this comprehensive guide, you now have all the knowledge needed to maximize your aura collection in October 2025!