Today is the last day to obtain the Jewel of the Firelord helm transmog via Prime Gaming. Starting tomorrow, Hood of the Hungering Darkness will be available instead.
For those that missed it, three helms previously available on the Blizzard Shop will be obtainable through Prime Gaming in the next few months:
Jewel of the Firelord: Available now, last day to claim today, July 26
Hood of Hungering Darkness: Available July 27, claim by August 23
Crown of Eternal Winter: