Source: Arcana Unleashed
Wondrous Item, Rare (Requires Attunement)
This magic tapestry can be hung on a wall or another suitable vertical surface. The tapestry magically unravels and reweaves itself to illustrate the content and emotions of your most recent dreams.
You gain the following benefits while the tapestry is hung and you are within 30 feet of it.
Dream Wisdom. During a Long Rest, you can spend an hour studying the tapestry. At the end of the Long Rest, roll 1d20 and record the number rolled. Once before you finish a Long Rest, you can replace any D20 Test you make with this result. You must choose to do so before you roll the D20 Test.
Message Recorder. If you are targeted by the Dream spell, the tapestry records the appearance and name of the spell’s caster in its design.
Mind Wall. While you have the Unconscious condition, you have Advantage on Intelligence, Wisdom, and Charisma saving throws.