What is Mana ?
Mana is a resource required by heroes to use abilities and some items. Each hero has a limited mana pool that can be increased through attributes (intelligence), items, or talents. Mana regenerates over time and through regeneration effects, and is spent whenever an ability is used. However, there is an exception — Huskar, who, due to his innate ability Blood Magic, has no mana at all, and his abilities and items consume health instead of mana.
Every hero has a base mana pool of 75MP, while most non-hero units only have a set mana pool if they have abilities which require mana, with a few exceptions. These values cannot be altered. This means that a hero's maximum mana cannot drop below 75MP.
Because each point of intelligence increases a hero's mana by 12MP, a hero's mana pool scales upwards with their intelligence points. Similarly, because every hero has some measure of intelligence growth per level (except Ogre Magi), all heroes gain more and more mana as they continue to level up. A hero's base intelligence cannot drop below 1; however, it is possible to achieve 0 intelligence with the help of negative bonus intelligence.
