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Inventor's Workshop

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"In the Inventor's Workshop you can research and upgrade your defensive fortification technologies. By upgrading the technology, you are able to strengthen your line of defense and protect your kingdom and its treasure."

The maximum level you can upgrade a structure is shown in the tables below. You can level up a construction for 3 or 4 times. Each time you upgrade a plan, you will allow to upgrade that at the Maximum Research Level listed near the column of plans. So if you want to upgrade an Arrow Tower to level 6, you have first to upgrade "Plan Arrow Tower level 2" that allow you to upgrade then it.

Maximum research levelsEdit

Levels      → 1 2 3 4 5 6 7 8 9 10 11 12
Barricade 1 2 2 2 3 3 3 4 4 4 4 4
Arrow Tower 1 1 2 2 2 2 3 3 4 4 4 4
Spikes 1 1 2 2 2 3 3 3 4 4 4
Bomb Tower 1 1 1 2 2 3 3 4 4 4
Frost Tower 1 1 2 2 3 3 4 4 4
Blockade 1 1 2 3 3 4 4 4
Gargoyle Tower 1 1 2 2 3 4 4
Firebolt Tower 1 1 2 3 4 4
Snake Tower 1 2 3 4 4
Skull Tower 1 3 4 4
Lightning Tower 3 3
Jester Box 2
Heal Tower 3

LevelsEdit

Level Requirement Upgrade Cost Upgrade Time
1 Throne Room level 1 Gold 1K Time 2m
2 Gold 3K Time 10m
3 Throne Room level 2 Gold 10K Time 30m
4 Throne Room level 3 Gold 25K Time 1h
5 Throne Room level 4 Gold 50K Time 4h
6 Throne Room level 5 Gold 100K Time 12h
7 Throne Room level 6 Gold 250K Time 1d
8 Throne Room level 7 Gold 500K Time 2d
9 Throne Room level 8 Gold 1M Time 3d
10 Throne Room level 9 Gold 2M Time 4d
11 Throne Room level 10 Gold 6M Time 5d
12 Throne Room level 11 Gold 8M Time 6d

Plan BarricadeEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanBarricade
1 3 Unlock Inventor's Workshop level 1
2 6 Gold 25K Time 3h
3 9 Gold 150K Time 1d
4 19 Gold 350K Time 2d

Plan Arrow TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanArrowTower
1 3 Unlock Inventor's Workshop level 1
2 6 Gold 50K Time 4h 30min
3 9 Gold 250K Time 1d 12h
4 18 Gold 750K Time 3d

Plan SpikesEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanSpike
1 3 Unlock Inventor's Workshop level 2
2 6 Gold 50K Time 4h 30min
3 9 Gold 250K Time 1d 12h
4 19 Gold 750K Time

Plan Bomb TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanBombTower
1 3 Unlock Inventor's Workshop level 3
2 6 Gold 150K Time 4h 30min
3 9 Gold 750K Time 1d 12h
4 18 Gold 1M Time 3d

Plan Frost TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanFrostTower
1 3 Unlock Inventor's Workshop level 4
2 6 Gold 250K Time 4h 30min
3 9 Gold 750K Time 1d 12h
4 18 Gold 1.25M Time 3d

Plan BlockadeEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanBlockade
1 3 Unlock Inventor's Workshop level 5
2 6 Gold 150K Time 4h 30min
3 9 Gold 750K Time 1d 12h
4 18 Gold 1.5M Time 3d

Plan Gargoyle TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanGargoyleTower
1 3 Unlock Inventor's Workshop level 6
2 6 Gold 1M Time 1d 18h
3 10 Gold 2M Time 3d 12h
4 16 Gold 3M Time

Plan Firebolt TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanFireboltTower
1 3 Unlock Inventor's Workshop level 7
2 6 Gold 2M Time 2d 6h
3 10 Gold 3.5M Time 4d 12h
4 16 Gold 5M Time 5d

Plan Snake TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanSnakeTower
1 3 Unlock Inventor's Workshop level 8
2 6 Gold 1M Time 2d
3 10 Gold 2.5M Time 3d
4 16 Gold 3.5M Time 4d

Plan Skull TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanSkullTower
1 3 Unlock Inventor's Workshop level 9
2 6 Gold 3M Time 2d 6h
3 9 Gold 4M Time 3d 9h
4 15 Gold 5M Time 4d 12h

Plan Lightning TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanLightningTower
1 3 Unlock Inventor's Workshop level 10
2 6 Gold 4M Time 2d 6h
3 9 Gold 5M Time 4d 12h

Plan Jester BoxEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanJesterBox
1 3 Unlock Inventor's Workshop level 12
2 6 Gold 4M Time 2d

Plan Heal TowerEdit

Picture Level Max. Research Level Upgrade Cost Upgrade Time
PlanHealTower
1 3 Unlock Inventor's Workshop level 12
2 6 Gold 4M Time 2d 6h
3 9 Gold 5M Time 4d 12h

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