Mana Void is an ability in the game Dota 2 that targets an area, creating a zone where enemies are silenced and unable to cast spells. This ability is often used strategically to disrupt opponents during team fights, preventing them from using their abilities effectively. When enemies are caught in the Mana Void, they also take damage based on the amount of mana they are missing. This makes it particularly effective against heroes who rely heavily on their spells. The ability is commonly associated with the hero Anti-Mage, who excels at draining opponents' mana and punishing them for it.