Star Laboratory

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!

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!

Level 1

Level 2

Level 3

Level 4

Level 5

Level 6

Level 7

Level 8

Level 9

Available on

Game online Play Chess Play Xiangqi

Stats

size on board
4x4

Levels

Level	hitpoints	build cost	build time	experience gained	builder hall level required
1	650	1,000*	N/A	N/A	2
2	800	15,000	10m	24	2
3	960	50,000	30m	42	3
4	1,152	300,000	8h	169	4
5	1,382	700,000	12h	207	5
6	1,658	1,000,000	1d	293	6
7	1,990	2,000,000	2d	415	7
8	2,388	3,000,000	3d	509	8
9	2,507	4,000,000	4d	587	9

SUMMARY

The Star Laboratory is unlocked at Builder Hall level two.
It is automatically upgraded to Level 1.
At Builder Hall level one, it is ruined.
The Star Laboratory allows the player to upgrade their troops, much like the Laboratory in the Home Village.
Troops are upgraded using Builder Elixir. Upgrades 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.
All troops unlock their special abilities at level two, except the Night Witch, whose ability is unlocked at level four. The abilities improve as a troop is upgraded.

UPGRADE DIFFERENCES

Each time the Star Laboratory is upgraded (depending on what level) you can see Roman numerals (I-VIII) 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 observatory-like 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.The rope is removed from the telescope, and its rim becomes stone.
At level 3, the telescope is longer and a ramp replacing the stairs on the left side. The door frames are also partially gold, and the telescope's rim becomes metal.
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.
At level 6, the telescopes aperture is larger and the type is changed with a refracted focal length, making the overall length shorter.
At level 7, a secondary, smaller telescope is added to the right of the primary.
At level 8, a tertiary telescope is added next to the secondary on top of the primary. The pressure gauge also turns golden on top.

TRIVIA

Like the Clock Tower, it has Roman numerals corresponding to its level.
The Star Laboratory is the Master Builder's favorite building. This is mentioned in the tutorial.
Unlike most other Builder Base buildings, the Star Laboratory takes up a 4x4 space.
All troops can be upgraded to level two without having to upgrade the Star Laboratory to match the Builder Hall level.
The Star Laboratory has the same research icon (with a sword and a spell bottle) as the Laboratory. However, the Builder Base has no spells.
The upgrade time and cost of each troop "smoothly" follows the time and cost to unlock it (i.e. upgrading the Builder Barracks to the corresponding level).

Icon Des

	Tapping this icon displays information about the Star Laboratory, such as Level and Hitpoints.
	Tapping this icon begins upgrading the Star Laboratory to the next level, if you have enough resources and a free Master Builder. When the Star Laboratory is at maximum level, this icon is not shown.
	Tapping this icon instantly upgrades the Star Laboratory to the next level, at the cost of one Hammer of Building if you have one. When the Star Laboratory is at maximum level, this icon is not shown.
	Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
	Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.
	Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.
	Tapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.
	Tapping this icon opens up the Star Laboratory interface, allowing you to upgrade your troops' levels.

All Units

ARMY	• Army Camp • Barracks • Dark Barracks • Laboratory • Spell Factory • Dark Spell Factory • Workshop • Barbarian King Altar • Archer Queen Altar • Grand Warden Altar • Strongman's Caravan
DEFENSE	• Cannon • Archer Tower • Mortar • Wizard Tower • Air Sweeper • Hidden Tesla • Inferno Tower • X-Bow • Eagle Artillery • Wall • Air Defense • Bomb Tower • Giga Tesla • Scattershot • Giga Inferno
HEROES	• Barbarian King • Archer Queen • Grand Warden • Royal Champion
RESOURCES	• Town Hall • Elixir Collector • Elixir Storage • Gold Storage • Dark Elixir Storage • Treasury • Clan Castle • Magic Items • Dark Elixir Drill • Builder's Hut • Gold Mine
SIEGE_MACHINES	• Stone Slammer • Battle Blimp • Wall Wrecker • Siege Barracks
SPELLS	• Lightning Spell • Jump Spell • Freeze Spell • Earthquake Spell • Rage Spell • Haste Spell • Poison Spell • Bat Spell • Healing Spell • Clone Spell • Skeleton Spell
TRAPS	• Bomb • Spring Trap • Seeking Air Mine • Skeleton Trap • Giant Bomb • Air Bomb • Tornado Trap
TROOPS	• Archer • Giant • Balloon • Barbarian • Wall Breaker • Wizard • P.E.K.K.A. • Minion • Dragon • Golem/Golemite • Hog Rider • Electro Dragon • Lava Hound/Lava Pup • Goblin • Golem • Witch • Healer • Bowler • Lava Hound • Miner • Valkyrie • Witch/Skeleton • Ice Golem • Baby Dragon • Yeti

ARMY	• Builder Barracks • Star Laboratory • Battle Machine Altar • Army Camp
DEFENSE	• Double Cannon • Crusher • Archer Tower • Roaster • Guard Post • Cannon • Giant Cannon • Firecrackers • Multi Mortar • Hidden Tesla • Wall • Air Bombs • Mega Tesla • Lava Launcher
HEROES	• Battle Machine
RESOURCES	• Gold Mine • Gold Storage • Builder Hall • Elixir Storage • Elixir Collector • Clock Tower • Gem Mine
TRAPS	• Push Trap • Mega Mine • Mine • Spring Trap
TROOPS	• Baby Dragon • Raged Barbarian • Bomber • Night Witch/Bat • Sneaky Archer • Drop Ship • Beta Minion • Night Witch • Boxer Giant • Super P.E.K.K.A • Cannon Cart • Drop Ship/Skeleton • Hog Glider

BOOKS	• Book of Fighting • Book of Everything • Book of Building • Book of Heroes • Book of Spells
POTIONS	• Builder Potion • Power Potion • Clock Tower Potion • Training Potion • Resource Potion
RUNES	• Rune of Dark Elixir • Rune of Builder Gold • Rune of Elixir • Rune of Gold • Rune of Builder Elixir
RINGS	• Wall Ring
HAMMERS	• Hammer of Fighting • Hammer of Building • Hammer of Heroes • Hammer of Spells

SPELLS	• Santa's Surprise • Birthday Boom
TRAPS	• Freeze Trap • Shrink Trap • Santa Strike • Pumpkin Bomb
TROOPS	• Pumpkin Barbarian • Giant Skeleton • Battle Ram • El Primo • Ice Wizard • Skeleton Barrel