Veylune

Veylune is a Legendary that looks like a calm morning in a field of glowing flowers. The Sol's RNG Wiki gives it 1 in 555,000 in general and 1 in 277,500 in the Lost Forest biome, so a 10x potion brings that to roughly 55,500 rolls anywhere or 27,750 in the Lost Forest. It arrived with the Radiant Forest Update and is credited to onlyyxyyz and khxlla, the same pair behind True Jade.

The wiki says the player is placed on a field of luminous flowers of many colors, under a radiant sun and several clouds, a sky that resembles Vendor and other summer event auras. The cutscene begins with a black screen and a banging sound that gives way to silence, then a four-pointed star wrapped in a teal and orange gradient expands and cracks open in white to reveal the name.

The in-game text is gentle: calmly resting in a place unknown to others, letting thoughts relax as the day gets brighter. It is one of the more approachable Radiant Forest-era auras, since Lost Forest is a native biome here rather than a gated quest.