What Austrian black metal band influenced the Blackgaze genre?
Blackgaze:  Influenced by atmospheric black metal bands like Ulver and Summoning, the genre was pioneered by French musician Neige around 2005 through the projects Alcest and Amesoeurs and has risen to prominence with the success of American group Deafheaven. Summoning (band): Summoning is an Austrian black metal band based in Vienna.
Summoning