The Skill asset allows to very easily define Charged Attacks.
When a Charge skill starts it will enter an animation State which may (or may not) change the character's locomotion properties.
Charging a Slash
In this example, the player holds the left mouse button and the character enters a sheathed state in which it can't move. Upon releasing the button, the character performs the Skill attack.
It's important to note that the Combo asset defines whether a Skill is a charged one or not.
When selecting the Charge option from the Combo asset, you'll be prompted whether to auto-release the Skill after the minimum charge or let the user specify when to release it.
It will also allow to define the minimum amount of time to charge the attack in order to have any effect.
More about Combos
For more information about Combos, see the Combos section.