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A magical stairwell connecting an infinite number of landings, each with some number of doors. As traveling through the Ethereal with the added step of starting in the Astral Plane and finding your way to the Ethereal from there via a color pool. If you know the way, you can navigate from one plane to another, though certain routes take longer than others (and are quite a bit more dangerous). The elemental planes are all connected to each other and the Elemental Chaos, the ill-defined edge of the infinite planes. Travel from one of the other Inner Planes.Ethereal Curtains in the Deep Ethereal allow you to move to the border regions of the Plane of Air, and you can use various methods to get from the border regions to the plane proper. Other items can be created to do the trick, though anyone who could make such an item already has the ability to travel using methods 1-3. A cubic gate can get you there, as well as a well of many worlds. in older editions), you'd find these in spots that were thematically important for the plane in question, so in the midst of a tornado or permanent thunderstorm would be "good" places to look. The Air Node in Princes of the Apocalypse is one such example, if you're okay with hanging out with a Prince of Elemental Evil. The most straightforward would be using wish to travel. Most of these will be mimicking one of the first two options, so they can be lumped together. For the party that doesn't feel like spending all day traveling. Always a popular option, if you're a mid-level planar traveler and have access to the requisite components.
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