Baskerville Manor - a home full of mystery and dangers – uses the secret passageways for a sneak attack!
This DLC unlocks a Baskerville Manor - map for both 1v1 and 2v2 games with a special "Secret Passages" rule.

Secret Passages:
Secret passages can be used by fighters to move quickly across the battlefield. Their occurrence depends on the map. These passages are indicated by the special icons on certain spaces. A fighter can move from one space with a secret passage to any other space with a secret passage as if they were adjacent.
Spaces with secret passages are not considered adjacent for any other purpose besides moving (e.g. fighters can’t attack through them).

More details on the official game page of Unmatched: Digital Edition - Baskerville Manor ...