On Thursday, I got a \aITEM 235611012 -144420614 0 0 0:[Spire Lord's Ire]\/a and installed in on my necklace. The Examine window says, "This will grow in power as you complete Heroic Blood of Luclin Weekly Missions". Checking my quest journal, the weekly solo mission should be counting as Heroic, but it did not level the adorn any:
