In the sunken ruins of the temple, you find a grotto leading deep below the sea level. Much of the grotto is submerged underwater.
Setup: Set Shrine to Morgoth aside, out of play. Prepare the Grotto deck. Add the top 2 locations from the Grotto deck to the staging area, Grotto side faceup (the top 3 instead if there are 3 or more players in the game). The first player takes control of Captain Sahír, and the last player takes control of Na'asiyah (objective-ally sides faceup).
While an underwater location is the active location, players cannot play attachments or allies.
Forced: After a double-sided location is explored, add the top location from the Grotto deck to the staging area, Grotto side faceup.
You cannot advance unless there are at least 3 Underwater locations in the victory display.
Forced: When The Grotto's Entrance is flipped over while active, put Temple Guardian into play from the victory display, engaged with the player with the highest threat.
When the 8th progress is placed on The Grotto's Entrance, the players have found the sunken ruins and win the game.
Uncharted. Immune to player card effects.
Travel: Exhaust the Gate Key to travel here.
Forced: After Temple of the Deceived becomes the active location, flip it over.
When Revealed: Add the top location from the Grotto deck to the staging area and flip that location to its Underwater side. This effect cannot be canceled.
Shadow: Attacking enemy gets +1 (+2 instead if the active location is Underwater).
When Revealed: Until the end of the quest phase, each ally gets -1 If the active location has the Grotto trait, remove all progress from it and flip it to its Underwater side.
Shadow: If the active location is Underwater treat this attack as if it were undefended.