The maximum number of stacks from Vale’s passive skill “windtalk” is 10, which increases movement speed by 80. Windtalk is a stack that Vale gains when he kills or assists in killing an enemy.

If you gain 1 stack of Windtalk, your movement speed increases by 8.
If you gain 2 stack of Windtalk, your movement speed increases by 16.
If you gain 3 stack of Windtalk, your movement speed increases by 24.
If you gain 4 stack of Windtalk, your movement speed increases by 32.
If you gain 5 stack of Windtalk, your movement speed increases by 40
If you gain 6 stack of Windtalk, your movement speed increases by 48.
If you gain 7 stack of Windtalk, your movement speed increases by 56.
If you gain 8 stack of Windtalk, your movement speed increases by 64.
If you gain 9 stack of Windtalk, your movement speed increases by 72.
If you gain 10 stack of Windtalk, your movement speed increases by 80.
Introduction to Vale’s Passive
To gain stacks of Windtalk from Vale’s passive, you must kill or assist in killing an enemy. This effect can stack up to 10 times.
Vale’s passive advantage:
Increased Movement Speed makes Vale more mobile.
Vale will snowball quickly when he kills enemies.
Vale has a big advantage in teamfights.
Easier to poke enemies.
Roam faster.
Vale’s passive weakness:
Vale needs to kill enemies or assist in killing them to accumulate windtalk. This will cause Vale to lose minion stats, or possibly be destroyed if not attacked at the right time.
How to increase windtalk fast ?
In the early game, try to poke the enemy, ask for ganks to kill them.
Push the wave quickly then gank to find kills or support in other lanes.
Actively participate in teamfights.
Read more: Vale Build