Blizzard numbers items as they are created, so the named items next to ID 174872 (174863 to 174877) were usually added in the same batch as Ny'alotha Allseer: the same quest line, zone, vendor or reward set.
Spawn of VexionaID 174863 · Quest · item level 50"Part of the fallen dragon's clutch, found deep within the bowels of N'Zoth."
Shard of CorruptionID 174867 · Miscellaneous"A thick miasma of corruption seeps from the shard. It feels incredibly heay, and holding it imparts an..."