Rage

Flame of emotions is how the game describes Rage, and the Sol's RNG Wiki translates it into something small and legible: a bright red flame spins clockwise in the middle of the torso, a larger burst of fire flares up now and then for about half a second, a faint red mist surrounds the player and red particles float upward.

This is one of the Basic auras that predate the Main Update, and its 1 in 128 chance is exactly 2 to the 7th power. At 1x luck that is about 128 rolls on average, or roughly 12.8 at 10x, so most players meet it very early. It also acts as a parent: in the collection, clicking Rage reveals its mutations Rage : Heated (1 in 12,800) and Rage : Brawler (1 in 1,280,000). A crafting route is on record too, and it asks for 23,000 Ragnaröker, 1,000 Volcanic Devices and 5 Rage Potions, an unusually heavy bill for such a common aura. ep1k_sol is credited as the creator.