Map containing the location of skyshard and all bosses in The Lost City of the Na-Totambu public dungeon located in Alik’r Desert.

The Lost City group event puzzle solution
The Lost City group event has an easy puzzle (Puzzle of the Guardians achievement) which you must solve in order to spawn the boss. There are 6 glowing “buttons” on the floor, and the puzzle requires two players to be solved. You must activate the floor pads by having both players stand at the same time on both Scarab pads, both Spider pads, and then both Scorpion pads. You’ll know it’s working once the pads stop glowing.