Arborea

Larger than life, Arborea is a place of violent moods and deep affections, of whim backed by steel, and of passions that blaze brightly until they burn out. Travel on this plane is difficult due to its immensity and wildness. It is home to both the Greek gods on Mount Olympus and a pantheon of elvish gods.

When a visitor leaves Arborea, they must make a Charisma saving throw against a DC of 5, plus 1 for each day spent on the plane. On a failed save, the creature becomes afflicted with a yearning to return to Arborea. As long as the effect persists, the creature has disadvantage on ability checks. At the end of each long rest, the creature can repeat the saving throw, ending the effect on a success. A dispel evil and good spell removes this effect from the creature.