The Storm Atronach crown crates were available during December 2016 through the first quarter of 2017 in ESO (The Elder Scrolls Online). They also made a limited return during December 4 to 7 in 2017. They also returned in April 30 to May 7 in 2020.
If you want any of the listed items below you will have to be patient, because it can take months or even years until they reappear for a very short duration, usually 1 week.
