If you want to know How to Get 6th Builder COC, then read this full story.

In order to get Master Builder to Home Village,

you will first need to complete some defense and troop upgrades.

At Builder Hall 9, a new building in O.T.T.O Hut is available to install.

Upgrading O.T.T.O Hut allows the Master Builder to get an additional builder in the Builder Base.

To upgrade the O.T.T.O Hut to level 5 and get him to start working at Home Village, you have to:

Step 1: Gear Up 3 buildings in Home Village

Step 2: Upgrade Cannon Cart to level 18.

Step 3: Upgrade Mega Tesla to level 9.

Step 4: Upgrade Battle Machine to level 30

After completing the 4 steps, you can upgrade the O.T.T.O instantly from level 1 to 5 in no time.

Once O.T.T.O gets to level 5, it becomes available as a Builder in queue.

To Migrate Master Builder from Builder Base to Home Village, just press the O.T.T.O Hut or Builder Hall.

And to migrate from Home Village to Builder Village, just press the Master Builder's Hut in the Home Village.