With the last print run in 2013, Yggdrasil has long been out of print. However, due to popular demand, Ludonaute has decided to print a limited run of copies for release at Essen Spiel.
The reprint is only the base game, not containing the Asgard expansion materials. But, the "Transe rules" are in the reprint game rules.
Since everyone can't make it to Spiel, Ludonaute has made BGG the U.S. source of the game!
Find more info at the BGG listing.