We have had a lot of news pertaining to the Inspiration Catalyst, the Dragonflight version of the Creation Catalyst this week. With the latest Dragonflight beta build, assets have been added pointing out the possible location of the Inspiration Catalyst!
The possible location of the Inspiration Catalyst is in Thaldraszus, near Tyrhold.
This structure is located relatively high up in the air, but it should be easily reachable with some dragonriding.