Hey Matt! Does the cosmology of Exandria make it incompatible with full-blown Planescape? E.g. Divine Gate rules out a lot. Not at all. The Divine Gate only prevents divinity from entering the prime material.
— Matthew Mercer (@matthewmercer) November 8, 2017
Travel between other planes is viable, should the story call for it! 🙂
— Matthew Mercer (@matthewmercer) November 8, 2017