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The Rarity of Sol’s RNG Undefined – Breakthrough and Biome
Our Sol’s RNG Undefined guide goes over the process of obtaining the aura, as well as the required biome and rarities.

The Sol’s RNG Undefined aura is one of the more mysterious ones to collect! Read on to find out about the rarity, required biome, and the Breakthrough chance of the aura.
Sol’s RNG is a unique Roblox game that is still in development. This means that further content may be added in future updates, but for now, the main goal in the game is to obtain as many auras as possible! You have unlimited rolls, and you can also craft items to increase your overall luck. In short, the endgame is being able to flex the rarest and coolest auras around!
Visit the official Roblox page if you want to try your luck in obtaining the rare aura. If you’re not too sure about what a Breakthrough is, have a gander at our Sol’s RNG Breakthrough guide. Need some freebies? We’ve got a Sol’s RNG Codes guide!
Sol’s RNG Undefined
The Undefined aura is a pretty unique one! While having the aura equipped, your character gets a large X across the face. It might not be one of the most visually impactful auras in the game, but it’s quite sought-after! There are also floating stars and white beams, as well as a deformed rarity tag above the aura name – the rarity tag for other auras usually includes something along the lines of ‘1 in 50,000’.
Undefined Rarity
The actual rarity of Undefined is 1 in 1,111 during the Null biome. To know whether the biome is currently Null or not, take a look around to see if the environment has been covered in a grey mist. The Null biome itself has a 1 in 13,333 chance of appearing.
However, a Breakthrough roll for Undefined is 1 in 1,111,000, with a whopping 1,000 multiplier. A Breakthrough occurs in any biome (time-wise and weather-wise) and allows you to obtain an aura no matter which biome is currently active. By entering first-person mode in Sol’s RNG, your vision will be partially blocked if you have the Undefined aura equipped.
Adele Wilson
Editor
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