Air Magic

Basic:

 Increases the effectiveness of Air Magic spells.  Effect varies from spell to spell

Advanced:

 Increases the effectiveness of Air Magic spells.  Effect varies from spell to spell

Expert:

 Increases the effectiveness of Air Magic spells.  Effect varies from spell to spell

Archery

Basic:

 Ranged attack damage is increased by 10%

Advanced:

 Ranged attack damage is increased by 20%

Expert:

 Ranged attack damage is increased by 30%

Armorer

Basic:

 Damage inflicted on troops is reduced by 5%

Advanced:

 Damage inflicted on troops is reduced by 10%

Expert:

 Damage inflicted on troops is reduced by 15%

Artillery

Basic:

 Ballista shots have a 50% chance of dealing double damage

Advanced:

 Ballista shots have a 75% chance of dealing double damage

Expert:

 Ballista shots deal double damage

Ballistics

Basic:

 One shot:  60% chance to hit intended target.  50% chance for max. damage

Advanced:

 Two shots:  60% chance to hit intended target.  50% chance for max. damage

Expert:

 Two shots: 75% chance to hit intended target.  100% chance for max. damage

Diplomacy

Basic:

 25% of fleeing creatures offer to join / Cost of surrendering reduced by 20%

Advanced:

 50% of fleeing creatures offer to join / Cost of surrendering reduced by 40%

Expert:

 All fleeing creatures offer to join / Cost of surrendering reduced by 60%

Eagle Eye

Basic:

 Hero has a 40% chance to learn enemy spells of 2nd level or below

Advanced:

 Hero has a 50% chance to learn enemy spells of 3rd level or below

Expert:

 Hero has a 60% chance to learn enemy spells of 4th level or below

Earth Magic

Basic:

 Increases the effectiveness of Earth Magic spells.  Effect varies from spell to spell

Advanced:

 Increases the effectiveness of Earth Magic spells.  Effect varies from spell to spell

Expert:

 Increases the effectiveness of Earth Magic spells.  Effect varies from spell to spell

Estates

Basic:

 125 gold per day is generated

Advanced:

 250 gold per day is generated

Expert:

 500 gold per day is generated

Fire Magic

Basic:

 Increases the effectiveness of Fire Magic spells.  Effect varies from spell to spell

Advanced:

 Increases the effectiveness of Fire Magic spells.  Effect varies from spell to spell

Expert:

 Increases the effectiveness of Fire Magic spells.  Effect varies from spell to spell

First Aid

Basic:

 Regenerates up to 50 hit points of the top creature in a troop

Advanced:

 Regenerates up to 75 hit points of the top creature in a troop

Expert:

 Regenerates up to 100 hit points of the top creature in a troop

Intelligence

Basic:

 Maximum spell points are increased by 25%

Advanced:

 Maximum spell points are increased by 50%

Expert:

 Maximum spell points are doubled

Leadership

Basic:

 Morale is increased by 1

Advanced:

 Morale is increased by 2

Expert:

 Morale is increased by 3

Learning

Basic:

 Earned experience is increased by 5%

Advanced:

 Earned experience is increased by 10%

Expert:

 Earned experience is increased by 15%

Logistics

Basic:

 Hero's movement range is increased by 10%

Advanced:

 Hero's movement range is increased by 20%

Expert:

 Hero's movement range is increased by 30%

Luck

Basic:

 Luck is increased by 1

Advanced:

 Luck is increased by 2

Expert:

 Luck is increased by 3

Mysticism

Basic:

 Spell point regeneration is increased by 2 points per day

Advanced:

 Spell point regeneration is increased by 3 points per day

Expert:

 Spell point regeneration is increased by 4 points per day

Navigation

Basic:

 Hero's movement range on water is increased by 50%

Advanced:

 Hero's movement range on water is increased by 100%

Expert:

 Hero's movement range on water is increased by 150%

Necromancy

Basic:

 10% of enemy creatures killed are resurrected as skeletons

Advanced:

 20% of enemy creatures killed are resurrected as skeletons

Expert:

 30% of enemy creatures killed are resurrected as skeletons

Offense

Basic:

 Melee damage inflicted is increased by 10%

Advanced:

 Melee damage inflicted is increased by 20%

Expert:

 Melee damage inflicted is increased by 30%

Pathfinding

Basic:

 Removes the penalty for moving over rough terrain, reduces penalty for sand, snow & swamp.

Advanced:

 Removes the penalty for moving over sand and snow terrain, reduces penalty for swamp.

Expert:

 Removes all penalties for all terrain types.

Resistance

Basic:

 5% chance that enemy spells cast on hero's troops will fail

Advanced:

 10% chance that enemy spells cast on hero's troops will fail

Expert:

 20% chance that enemy spells cast on hero's troops will fail

Scholar

Basic:

 Teach and learn spells of second level and below

Advanced:

 Teach and learn spells of third level and below

Expert:

 Teach and learn spells of fourth level and below

Scouting

Basic:

 Hero's view radius is increased by 1 square

Advanced:

 Hero's view radius is increased by 2 squares

Expert:

 Hero's view radius is increased by 3 squares

Sorcery

Basic:

 Increases the damaging effect of cast spells by 5%

Advanced:

 Increases the damaging effect of cast spells by 10%

Expert:

 Increases the damaging effect of cast spells by 15%

Tactics

Basic:

 Troops can be placed 2 rows from edge during combat.

Advanced:

 Troops can be placed 4 rows from edge during combat.

Expert:

 Troops can be placed 6 rows from edge during combat.
If facing an enemy hero who also has Tactics the number of rows from edge you can place your troops is dependent upon how much more advanced your tactics skill is in comparison to the enemy hero.  If they're the same...no additional movement is given.

Water Magic

Basic:

 Increases the effectiveness of Water Magic spells.  Effect varies from spell to spell

Advanced:

 Increases the effectiveness of Water Magic spells.  Effect varies from spell to spell

Expert:

 Increases the effectiveness of Water Magic spells.  Effect varies from spell to spell

Wisdom

Basic:

 The Hero can learn 3rd level spells and below

Advanced:

 The Hero can learn 4th level spells and below

Expert:

 The Hero can learn all spells