"[Eki] was swift like the wind and sprinted with haste. But surrounded by darkness, he lost his way." - Sein to Ori upon finding Eki's Ancestral Tree
Dash is one of the two new skills found in the Ori and the Blind Forest: Definitive Edition. It is received from Eki's ancestral tree in Black Root Burrows. It is the first of the two new skills encountered in the Defintive Edition.
The Dash skill sends Ori forward with a strong burst of speed. It is activated by pressing the RB button for controller or control for PC. It can only be used while Ori is on the ground. Ori will still take damage from enemies while dashing. This burst of speed lasts about half a second.
There are two upgrades on the ability tree which change the way Dash works. The first is Air Dash, which allows Ori to use Dash in the air as well as on the ground. Ori can only Dash once while in the air. However, moving through a Ginso Tree portal, bashing off of something, or using Kuro's feather in a wind current will allow Ori to use air Dash again before hitting the ground.
The second upgrade is Charge Dash, which allows Ori to charge up a more powerful Dash. When Ori dashes while charged, it will either send Ori toward the nearest enemy within a certain range and causing damage to the enemy, or send Ori forward with more speed than a normal Dash. You can charge up a Dash in a similar fashion to Charge Jump. Using Charge Dash costs one energy point. Charge Dash can be used in the air as many times as desired, as long as Ori has enough energy points.