Vital Energy (VE) is similar to MP (Magic Points) or SP (Skill Points) in other games. Vital Energy is used for virtually everything a player does. Attacking a mob with an active skill, using the Lightfoot technique, using passive abilities (meditation and steps), using Chi Kung attacks, using heal skills, and using buffs all consume anywhere from 1 to 300 VE per use.
When a player has no VE left, they are left at a severe disadvantage because they can no longer use any skills or abilities.
There are currently four ways a player can regain VE.