From Diablo Wiki
This page archives an attribute that was changed during the development. This is for future curiosity and reference. This page is not to be updated with current info; see the Attributes article for the latest information.
Willpower was the new name for the "Energy" attribute in Diablo III. It was removed from the game in pre-beta development in 2011, and is no longer an attribute.
Originally, Willpower governed the amount of spell damage bonus and extra health the consumption of a health globe would grant a character.
1 point of Willpower gave: (based on Class)
- +x% Spell Damage Bonus
- +x% Health Globe Bonus
- The effects of this stat will change from class to class. It will be our goal to make it roughly equivalently valuable across classes and versus other attributes.
- Basically this stat will give you more access to whatever restricts your resource by default: capacity, regen rate, degeneration rate, generation rate, etc.
Attribute points are no longer assigned by the player; they are auto-assigned. See the relevant section in the attributes article.
- Willpower is comparable to Diablo II's .
Initially Diablo III featured four attributes; Strength, Dexterity, Vitality, and Willpower. Willpower governed the amount of each class' resource, along with other functions such as spell damage. After the first major attribute reshuffling in late 2010, Willpower was one of the five attributes, along with Attack, Precision, Defense, and Vitality. That system was further revised in mid-2011, and Willpower was dropped entirely, presumably since it didn't work well with the varied class resources in Diablo III.