The following section contains information from Blizzard All-Stars and is not canon.

Mana towers are structures present in Blizzard All-Stars. They regenerate ammo, but not as quickly as they consume it by attacking, so they cannot be used as a "defense crutch". Enemy players can easily take them down if their heroes do not defend them, promoting a more aggressive hero vs hero style rather than a more passive hero vs tower style.^[1]

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