Mana Regeneration

A hero's mana regenerates over time. There are several ways to give mana regeneration to a hero.

Mana regeneration factors and boosts:

* Most heroes have some sort of 'base' mana regeneration. This is usually around 0.01 mana/second, and is fixed throughout the game.
Exceptions include:
o The Goblin Techies, who has (have) 0.02 mana/second 'base' mana regeneration.
o The Alchemist under Chemical Rage, who regenerates 3/6/12 points of mana per second. This is counted as 'base' regeneration.
* Intelligence also factors into mana regeneration, giving Intelligence*0.04 mana per second.
* Heroes can buy mana regeneration item to speed up their mana regeneration rates. For example, a Void Stone gives 100% mana regeneration, which means that if a hero had 50 Intelligence, Void Stone would double its mana regeneration from Intelligence such that it would regenerating as quickly as another hero with 100 Intelligence and no Void Stone.
* Heroes can stand next to their respective Fountains, which would give 4% of their maximum mana per second, plus an additional 7 constant mana regeneration.
* Certain heroes can gain mana through certain abilties. Some examples of these are Dark Ritual, and Sadist.
* Heroes can gain mana through the Crystal Maiden's Brilliance Aura, which is now global, or through an allied Ring of Basilius or Vladimir's Offering. The Ring of Basilius and Vladimir's Offering give you 0.65 MP/second and 0.8 MP/second, and this is fixed throughout the game. The same goes for the Crystal Maiden's Brilliance Aura. Which gives 2.4 MP/ second. These numbers are unaffected by mana regeneration items.
* Heroes can regenerate mana by getting a Regeneration Rune. A Regeneration Rune can regenerate 10% of the hero's maximum mana per second for 45 seconds. This effect is a non-combat effect, and stops upon the hero taking damage.
* Consuming Clarity Potions. A Clarity Potion will regenerate 100 mana over 30 seconds. This effect is a non-combat effect, and stops upon the hero taking damage.
* An Arcane Ring can be obtained. Replenish restores 135 mana in an area around the caster, which effectively gives 3,33~ mana/second (slightly less to the caster, due to the mana cost). This is equivalent to 83 INT, with 150% mana regeneration, making it the best regeneration item in the game.
* Bottle. It can store healing water from the Fountains or capture Runes. It heals 100 points of mana over 3 seconds per third filled. When vacated by a Rune it is filled by two-thirds.
* Bloodstone. Provides 200% mana regeneration and additional 2 MP/s per charge, if present.

How to apply all this:

For example a Rhasta with 2000 MP, 100 Intelligence, a Ring of Basilius, and a Guinsoo's Scythe of Vyse is standing next to the fountain. How much MP per second will he receive?

Answer:

* Regeneration from Intelligence = 100*0.04 = 4MP/sec;
* Regeneration from Guinsoo's Scythe of Vyse = 4MP/sec * 1.5 = 6MP/sec;
* Regeneration from Ring of Basilius = 0.65MP/sec;
* Regeneration from Fountain = 2000*0.04 = 80MP/sec + 7 additional = 87MP/sec;
* Regeneration from Base Regeneration = 0.01MP/sec

Altogether, Rhasta will gain 97.66MP per second.

Frequently asked question: Which is better for my hero early on: A Sobi Mask or a Ring of Basilius?
Answer: It depends.
Once your hero has above 33 INT, 50% mana regeneration from that tops the regeneration rate given by a Ring of Basilius. INT heroes usually have this amount of INT at around level 4-5, which makes a Sobi Mask more efficient. For heroes like the Rogueknight, however, 33 INT is only reached far later into the game, and it would then make sense to get a Ring of Basilius for them.

Mana Regen: Most heroes have a base of .01 mp/sec. Each additional point of intelligence gives an additional .04 mp/sec. Percent regen increases work off the entire base regen. Example:

A hero with 100 int has a mana regen rate of 4.01 mp/sec [.01 + (100 * .04)]. A void stone will double this. Two void stones will triple it. The equation:

Mana regen/sec = [.01 + (INT * .04)] * (1 + [% increase])

Note: (50% increase => .5, 100% increase => 1, 200% increase => 2, etc)

Hope that helps others. It certainly helps me.

Epsilon