1-7. Element Tunnels

Recruit water, earth, fire or air benders to aid your heroes in their fights.

Elemental Tunnels Overview:

There are four Elemental Tunnels in the game, each corresponding to a different element:

Tunnel of Water
Tunnel of Earth
Tunnel of Fire
Tunnel of Air

Through these tunnels you can recruit troops for your army.

Recruiting More Troops:

The more you upgrade these tunnels, the more troops you can recruit. Each tunnel gives you access to a different element of benders, and by upgrading them, you increase the number of troops you can raise.

Unlocking Higher-Level Benders:
You can also upgrade the type of troops you recruit. Higher-level troops are more powerful and will give you an edge in battles. However, these stronger troops are locked at first and must be unlocked through research.