Intelligence
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Basic Intelligence: Basic intelligence increases a hero's normal maximum spell points by 25%. (20% in Horn of the Abyss) 
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Advanced Intelligence: Advanced intelligence increases a hero's normal maximum spell points by 50%. (35% in Horn of the Abyss)
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Expert Intelligence: Expert intelligence doubles a hero's normal maximum spell points. (50% in Horn of the Abyss)
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Intelligence is one of the secondary skills. It increases the hero's maximum spell points depending on the level of the skill. Normal maximum spell points are ten times the knowledge skill, but at basic level of the intelligence skill they are increased by 25%, at advanced level by 50% and at expert level by 100%.
Heroes with Intelligence as a starting skill:
Caitlin the Cleric
Daremyth the Wizard
Iona the Alchemist
Nagash the Necromancer
Sephinroth the Warlock
Eovacius the Navigator 
Wrathmont the Artificer -
Frederick the Artificer 
Heroes with Intelligence as a specialty and a starting skill:
Heroes with Intelligence specialty receive 5% bonus per level to their Intelligence skill.
Increased max mana per level with Intelligence specialty:
| Basic | 1,25% | 1,00%
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| Advanced | 2,50% | 1,75%
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| Expert | 5,00% | 2,50%
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Horn of the Abyss[edit | hide | hide all]
In Horn of the Abyss , the skill percentages are decreased to 20%, 35%, and 50%.
Chance to get[edit | hide]
Out of total 112 for Shadow of Death, and of (112 + Interference chance) for Horn of the Abyss .
Banned skills change the probability.
| Town | Class | Chance to learn |
|---|---|---|
 Castle |
Knight | 1 (lowest) |
| Castle |
Cleric | 6 |
 Rampart |
Ranger | 2 |
| Rampart |
Druid | 7 |
 Tower |
Alchemist | 4 |
| Tower |
Wizard | 10 (highest) |
 Inferno |
Demoniac | 2 |
| Inferno |
Heretic | 6 |
 Necropolis |
Death Knight | 5 |
| Necropolis |
Necromancer | 6 |
 Dungeon |
Overlord | 1 (lowest) |
| Dungeon |
Warlock | 8 |
 Stronghold |
Barbarian | 1 (lowest) |
| Stronghold |
Battle Mage | 5 |
 Fortress |
Beastmaster | 1 (lowest) |
| Fortress |
Witch | 7 |
 Conflux |
Planeswalker | 1 (lowest) |
| Conflux |
Elementalist | 8 |
 Cove |
Captain | 3 |
| Cove |
Navigator | 8 |
 Factory |
Mercenary | 2 |
| Factory |
Artificer | 7 |
User commentary
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For a mostly magical hero, Intelligence is useful. The best time of Intelligence is mid-game, when getting e.g. 100 spell points instead of 50 may be crucial for a major battle. Horn of the Abyss Intelligence is a excellent supportive secondary skill. Especially in large and extra large maps, where heroes grow to be more "mighty and magical", the amount of mana points may become crucial. For example, resurrecting a large army can consume massive amount of mana points. Dungeon heroes may be able to pass Intelligence, because they typically have the opportunity to build Mana Vortex in their cities, which basically has the same effect as expert Intelligence – the spell point maximum is doubled. However, enormous spell points amount (4 times more than usual) can make a Warlock with Intelligence almost invincible. |