Rainy Egg

Rainy Egg had no rarity at all. The Sol's RNG Wiki says it has no defined chance because it was hatched from the Downpour Egg item during the Easter 2025 event, and a notice dated 5/7/25 confirms that the event is over. There is nothing to calculate in expected rolls: the path was to obtain the egg and hatch it, not to roll the aura directly.

It still has a clear identity. A dark storm cloud floats above the player and drops blue rain with a thin splash effect, like Stormal's cloud and like the rain of Sailor. The Downpour Egg rests on the player's right shoulder, an azure aura covers both, a small azure vortex swirls below and bubbles keep rising and popping.

It is one of the few auras whose source is an item instead of a number. It is currently unobtainable, and the listed creator is rocca108. The wiki does not record a description for it in the game.