Like the Plane of Shadow, the Plane of Faerie was an echo of the Material Plane, but its geography was altered by an expanding barrier, which contained within it worlds beyond the plane. This barrier was referred to as the Bloomtides, a flood of wild growth that rolled across the Feywild like a living sea. They were an ever-expanding growth of blossoms, vines, and radiant magic that surged forward, reshaping the land with every wave.
Where the Deepmists stretched the Shadowfell with opaque emptiness, the Bloomtides compressed the Feywild, destabilizing it it crashing waves. Demiplanes were contained within the tides, and over time, the Feywild's territory was eaten up as these domains expanded. Forests grew into impossible labyrinths overnight, meadows burst into oceans of flowers, and roots split stone as though the earth itself had been remade.
For many powerful Fey in the Seelie and Unseelie courts, the Bloomtides were a genuine existential threat. Archfey domains swelled outward in each tide, only to crash against rival courts whose realms grew just as swiftly, turning borderlands into tangled knots of unstable magic. The Mortalkind of the Prime Material fared worst of all, as the Bloomtides could sweep through the planes where Leylines were close. The tide charmed mortals, created unnavigable labyrinths, and consumed living beings; those who strayed too far into the Bloomtides often vanished without a trace.