Shadow Sprint

Description
[Low Rank Stealth Lv3 (Passive)]

[You hide your presence and move such that your opponent doesn't notice you. You can conceal any signs of your presence as well as your mana.]

[The Low Rank Stealth skill has become level 10, and evolved into the Intermediate level. You do not possess the talent to covertly kill your opponent, but you do possess the ability to move secretly and quickly. You have learned the Intermediate Shadow Sprint skill. The higher the skill level, the lighter the shadow.]

Somewhere before Chapter 17
Developed from Beginner Stealth into Low Rank Stealth

Chapter 59
Developed from Low Rank Stealth into Intermediate Shadow Sprint