Whenever you cast a spell from exile, create a Mystery token (A colorless Enchantment token with "As long as you control this, you may play cards opponent's own that were exiled with Intrigue).
Sacrifice three Mysteries: Search your library for a card, put that card into your hand, then shuffle.
A Series of Unfortunates Events-inspired plane
See Ressenwald, Unidentifiable.
UB super shadowy secret sect