The Phantom Mask/Gate Map
From SpiralKnights
First Floor:
Name: Mission LobbyDepth: 0
Level Link: This mission's lobby is standard.
Second Floor:
Name: Creeping CavernDepth: 1
Level Link: unique.
Third Floor:
Name: Emergency OutflowDepth: 2
Level Link: unique.
Fourth Floor:
Name: The LabDepth: 0
Level Link: While not actually listed in the mission's gate map, The Lab is always loaded upon completion and it has a special layout related to this mission.