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Mystery Doors is the first track under the adventure Wizard Battle.
In this map, the Grand Master Wizard sits on the top center watching over the coliseum. At the spectator seating areas, Starchy (blocked by the money counter on some devices) sits on the third row and fourth column from the top left corner, a penguin (maybe Gunter) sits on the second row and fourth column from the top right corner, a green candy cane person (Candy Cane Guy) sits on the first row and fourth column from the bottom left corner, and a white jelly roll person (Candy Person #24) sits on the second row and third column from the bottom right corner.
The coliseum is marked by dirt paths to make four columns of fields, with the ending paths marking towards under the scoreboards. Three gates serving as bloon entrances are located at the middle and two ends of the coliseum walls on Grand Master Wizard's side. The routes the bloons take in this map are complicated, and the description will reference the diagram to the left. All paths exit via an arch on the right side of the map under a scoreboard. Regular bloons spawn in a vastly different manner to MOAB-Class Bloons.
Regular bloons spawn in one of three paths (marked red, blue, and green in the diagram) that are used in a 3-round cycle, starting with the red path on round 1. On round 2, bloons will use the blue path, and on round 3 they will instead use the green path. After this, the bloons spawn again on the red path to repeat the cycle. Each of these three paths begin at one of three gates on the top wall of the arena.
MOAB-Class Bloons will always travel along the path marked in black on any round in which they spawn. They spawn through the entrance on the left side of the map, under the left scoreboard.
- Road items can be placed on the section of the track that none of the bloons will ever go to, but they will teleport to the nearest point of the track that bloons may cross.
- Cargo and Workshop, both Bloons TD 6 maps, also share the trait of having a separate path for MOAB-class bloons.