"Grab your magnifying glass and follow the Whispers. It will take a team with a cunning mind, an observant eye, and a playful attitude to solve the mysteries that await you below."

Story beats
- Illumineers find the Inkwell Caverns at the bottom of the Illuminary, and encounter unfinished glimmers called Whispers.
- Trails of torn Lorebook pages lead them on a mysterious journey through the Caverns as they seek to find the source of the Whispers and to restore them.

Theme/Tone: Mysterious, intriguing, frightfully-fun

Key franchises
- New: Gargoyles, Black Cauldron, and Legends of Sleepy Hollow
- Returning: Zootopia, DuckTales

- Continuation of new rarities including epic and iconic cards
- First set since the game's first rotation featuring a complete line-up of new cards to shake up the competitive landscape
- Introduction of two exciting new mechanics