These Secret Vendors in the Dreaming City that sell Tincture of Queensfoil can reached with hidden portals around the map. They are called Huginn and Muninn.
– Huginn (right Altar)
Sells Tincture of Queensfoil for 50 Baryon Boughs
– Muninn (left Altar)
Sells Charge of Light – Tier 2 for 25 Baryon Boughs