From The Forge: the Remembrance Glass
Aelis laid nine Imprinted Dark and an Unanswering Mirror on The Forge.

The Recipe: Remembrance Glass teaches the pouring of a Remembrance Glass at the glassworks kilns: raw glass melted into a clear sheet, death spores stirred in until their darkness spreads thin, timeless dust pressed across the back where a mirror would carry silver, then the sheet quenched and lifted out flat. One brew takes 2 Raw Glass, 2 Death Spore, 3 Timeless dust and 10 Water.

A Remembrance Glass keeps the one picture its holder sets into it, and shows it to whoever opens it. Once a picture is set it can never be changed, so the glass carries that memory to every hand it passes through.