1. Identify the landing square
The official overview says mirrors exchange a character or object with its reflection. Moving farther from the mirror projects that reflected position farther away. Change the starting distance deliberately and compare the resulting destination.
2. Keep the destination safe
The demo Q&A warns that the character can drown after a mirror move. A reachable reflected position is not automatically a safe one; inspect the destination before committing.
3. Account for the other copies
In NoLucksGiven’s demo playthrough, a duplicate’s death prevents a room clear. The player rewinds and keeps the copies alive before proceeding. Apply this as an attributed demo caution, not as a move list for an unidentified board.
Sources
- Official realm overview
- Demo Q&A narration — Jonathan Blow highlights
- Mirror Isles demo narration — NoLucksGiven
Information checked October 2, 2026. Demo and pre-release details remain scoped to the sources described above.