47 Major Upgrade of the Army

And the unit talent tree was his greatest reliance. 

First and foremost was the flagship unit of the territory, the Naga Warrior. 

[Naga Warrior (Tier 2, 5-Star)]

[Unlocked node A-2: Bloodthirsty Rage (Green Skill → Blue Skill)] [Requires 800 units of wood, 400 units of thick iron]

[Unlocking node B-2: Naga's Body (Green Skill → Blue Skill)] [Requires 800 units of fiber, 400 units of thick iron]

[Unlocked Point C-2: Bloodline Regeneration (Green Skill → Blue Skill)] [Requires 800 units of clay]

[Unlocked node D-2: Lost control (Race characteristic weakened/strengthened)] [Requires 800 units of clay, 800 units of crude iron]

[Unlocking any node can increase star level or tier.]

With a sum of reserved resources, he was much more confident this time.

He unlocked all four nodes.

In an instant, the resources on the interface were halved.

"Naga Warrior (Tier 2, 5-star) has advanced to Naga Warrior (Tier 3, 5-star)."