Enter the current level and the target level for each module and each slot: the cost shown only counts the difference between the two, not the cost from 0.
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Oars
Keel
Bell
Armored hull
Reinforced hull
Cannonball ramp
Loot crates
Grappling hooks
Combat manuals
Tool shed
Sextant
Powder horn
Harpoon fortification
Super telescope
Harpoon propulsion
Light harpoons
Sternpost
Rocket rack
Optimized cannon slot
Voodoo focus
Reinforced gems
Unleashed forces
Voodoo intensifier
Dark incantation
Amulet stand
Voodoo mirage
Soul devourers ritual
Healing hands
Shaky foundations
Illusion multiplier
Carpenter's blueprint
Poisoner's lab
Ravaging fire
Military expert
Fierce accountant
Elite helmsman
Cleanup brigade
Maintenance crew
Night crew
Pearls needed No icons yet for submarine modules (not available at the moment) — text only.
Offensive power distribution
Invisible enemy
Defensive power distribution
Chain reactions
Weak point exploitation
Trajectory calculation
Proximity alert
Light torpedoes
Thruster optimization
Strategic withdrawal
Armored segments
Reinforced structure
Ritual shield
Synchronized amulets
Voodoo evasion
Voodoo ritual
Amulet stand
Voodoo purge
Voodoo echo
Voodoo matrix
Reaper
Feedback loop
Predator
Breach mastery
Doppler effect
Marauder
Sighting scope
Crystal harmony
Map room
Advanced decoy scheme
Improved harpoon loading
Multiple warheads
Atlantean harpoon
Repair team
Weak point master
Elite maneuvers
Decoy specialist
Emergency team
Maximum alert
Pearls needed