These are bonus maps that open as sidequests on the main map – mostly when you are done with the game/right before the final map. You can unlock characters from the story this way who are otherwise dead.
|18||The Dead King’s Lament||Gangrel|
|20||A Hard Miracle||Emmeryn|
|21||Ghost of a Blade||Yen’fay|
|22||The Wellspring of Truth||Aversa|
|23||The Radiant Hero||Priam|