|Hero||Anvil, Aquila, Predator, Atlas, Fury, Messiah, Nova, Pryo, Swann, Tassadar|
|Description||Let the power lines flow through you and become the ultimate embodiment of true energy.|
|Effects|| energy restore|
shield restore delay
This mastery will increase your energy regen and maximum energy. Due to the way energy talents are spread out throughout the game, it is unlikely for heroes to require Energy Mastery later in the game. Most heroes can skip Energy Mastery until they feel they are constantly running out of energy.
Tychus has a unique version of Energy Mastery called Unshackled Energy Mastery, which also increases his Psionic Warrior cast radius by 2. Unless you're constantly using Escalate, it's generally an optional Mastery.
Dune is a unique hero that does not utilize energy to use abilities, and instead depends on rage generation through attacks. End of Times Mastery gives Dune a cleave attack, which generates 10 extra rage, and is essentially his version of Energy Mastery.
Most heroes can only effectively use one of Energy Mastery or the Absorption perk. Tychus and Nova are notable exceptions.