"The Star Laboratory searches the heavens for secrets to unlock a troop's full potential. Improve troop hitpoints, damage and housing space in addition to special troop abilities!"
It resembles an observatory but functions like the Laboratory.
The Star Laboratory is unlocked at Builder Hall level two.
It is automatically upgraded to Level 1.
Troops are upgraded using Builder Elixir. Doing so may improve their hitpoints, damage, their special ability, or the number of the same type of troop that is able to fit into one Army Camp.
Troops unlock their special abilities at Level Two, the abilities improving as they are updated.
Upgrade Differences
Each time the Star Laboratory is upgraded (depending on what level) you can see Roman numerals 1-8 in front that corresponds to the level of the Star Laboratory.
The star laboratory undergoes significant changes at on all of its levels.
At level 1, the star laboratory appears to be a building with a small telescope protruding through its top tied with ropes.
At level 2, the ladder is moved to the left side of the star laboratory with a ramp on the right.
At level 3, the telescope is longer and a ramp replacing the stairs on the left side. The door frames are also partially gold.
At level 4, the telescope is now golden along with the door frames and the ramp on the right side is replaced by a pressure gauge, similar to those on the Laboratory. The roman numerals also turn gold.
At level 5, the telescope becomes rotatable on top of the star laboratory using gears. The ramp on the left side turns into metal stairs.
Trivia
Like the Clock Tower, it has Roman numerals corresponding to its level.
The following chart lists the level of the laboratory on the top and the unit you can upgrade on the left. Each cell contains the level of the unit you can train, how much it costs in elixir, and how long it takes.
Elixir
Elixir