Yggdrasil, the World Tree

Yggdrasil's, the World Ash, branches reach through the worlds and planes to every place where the gods are worshiped.
Yggdrasil is a silver-barked ash, a tree with shimmering blue-black, oval leaves and a very rough, flaking bark that resembles a plowed field of gray clay. Footing can be treacherous, though spiked boots help. The branches rise from Yggdrasil's trunk like . . . well, like enormous trees. Branches are miles long, and not all of them have portals at the end, so long dead-end detours are common for groups traveling without a guide or directions.
The World Ash is guarded by creatures that never leave its shade, creatures that live and die on its bark. Yggdrasil's eagles and the ratatosk are the least of them. All along its length, Yggdrasil's bark and heartwood are home to enormous burrowing beetles, and its leaves and fungi feed entire herds of wild boar. The biggest and most terrible guardians are at the gates, where the roots and branches reach across the planar boundaries - for instance, at the World Ash's access to Niflheim. Called the land of mists, Niflheim is a layer of the Gray Waste that lies below Yggdrasil's roots and is guarded by Nidhogg, a fell dragon that gnaws at the roots of Yggdrasil, longing for the day when the damage brings down the World Tree and all of creation.
Yggdrasil connects planes very quickly and directly, and few journeys on the World Ash take more than a week. However, traveling along the trunk isn't without risks. Other than its creatures, the risks include falling into the Astral and walking down the wrong branch to an unexpected plane.

Type

Plane of Existence