You are transported to a different plane of existence.
You can specify a target destination in general terms:
Such as the City of Brass on the Elemental Plane of Fire, or House of Transformation on the second level of the Infinite Abyss, and you appear in or near that destination.
With a final whisper, the air hums as reality shifts around you. Emerald motes swirl, enveloping your form. The ground vanishes beneath your feet, and with a sudden pop, you’re transported to a new plane, your destination unfolding before you.