Construction
From IdleOn MMO Wiki
Construction is a W3 skill that Squire specializes in.
Build 27 unique Buildings!
There are 9 "utility" buildings that help general gameplay (3d printer, talent book library, etc).
There are also 9 "Wizard Defenders", used for Worship.
The last 9 are "Shrines", which you custom place on any map in the game, and it boosts a certain stat -- you can also LEVEL UP shrines by afk-ing on their map! But if you move the shrine, you'll remove all its EXP to next level (so you don't constantly move them around)
Cog System
Make different cogs, and place them on your Cog Board to increase your "build speed" for Construction! You can make your Cog Board bigger with Flags, and things get crazy as your board gets bigger and your Cogs get 'Surrounding' Effects!