Pierce the Veil

Pierce the Veil is a Witch Doctor passive skill, unlocked at level 27.

In-game
The increase in damage, while not multiplicative with other effects, does apply to spells that do not cost Mana. If the Witch Doctor utilizes a build that has little need for managing their Mana pool, Pierce the Veil can prove to be helpful for them. For builds that rely heavily on Mana, replenishing skills such as Blood Ritual, Spiritual Attunement and Rush of Essence can be taken to compensate.