Therma

Therma never reached regular players, and the wiki says it may never have been meant to. It is listed as a removed developer-exclusive aura made by Neulaw, and the Sol's RNG Wiki describes it as bugged, which is the stated reason it is not in the game today. There is even a note that it may have been deleted back in Eon 1, though that part is unconfirmed.

Visually, the wiki describes a yellow pulsing sigil on the player's back with a clock-like design and two spinning orbs. The player hovers while flames push out from the feet, and the idle pose raises one hand to hold what looks like a small sun. Debris flies up from below and ash pulses at the ground. The in-game text calls the wearer a figure of heat and light whose power is comparable to the sparks of creation.

Therma is also one of only two accepted community suggestions turned into developer-exclusive auras, the other being Road Trip. Had it been released, the wiki says its rarity would have been 1 in 5,000,000, so around 500,000 rolls at 10x luck.