Dragon Gauge
Official Lodestone Job Guide (Always up-to-date)
Dragon Gauge is Dragoon's Job Gauge.
Dragon Gauge
Upon learning the trait 
Life of the Dragon at Lv. 70, you will be able to view the Dragon Gauge. This timer indicates the duration of Blood of the Dragon, which increases damage dealt. Using Geirskogul grants Blood of the Dragon.
This timer indicates the duration of Life of the Dragon, which increases damage dealt. Using Geirskogul grants Life of the Dragon, and allows for the execution of more powerful actions such as Nastrond and Stardiver (acquired at level 80).
Available after learning 
Lance Mastery III at Lv. 90, using Raiden Thrust or Draconian Fury will sharpen the Firstmind's Focus, up to a maximum of 2 units. Once their focus is fully sharpened, you can execute Wyrmwind Thrust.
Simple Mode
First Brood's Gaze
Firstminds' Focus