Okay, I've been digging around and I got the following about heroic abilities. It seems that there are really rare ones (chance of 5% to get them) and common ones, but first I want to write about them in general.
Every heroic ability has a stat value (I'll abbreviate it as SV) that increases while being in the hall of fame. The value increases by 1D20 if it is below 200, or 1D10 if between 200 and 300, or otherwise by 1D5. How this heroic stat value scales to a bonus in the game depends on the heroic ability. For example:
- Abilities ~ SV * 10/100:
- Abilities ~ SV * 5/100:
- Adept Researcher
- Battle Bellow
- Abilities ~ SV * 4/100:
- Valor (to Morale)
- Heroic Stupidity (to Morale)
- Abilities ~ SV * 3/100:
- Abilities ~ SV * 2/100:
- Lightning Reflexes
- Heroic Precision
- Heroic Stupidity (to MR)
- Iron Will
- Heroic Battle Prowess
- Heroic Endurance
- Heroic Agility
- Abilities ~ SV * 4/300:
- Abilities ~ SV * 1/100:
- Heroic Agility
- Third Eye (for MR)
- Heroic Stupidity (to Attack)
- Abilities = SV / 200:
- Heroic Strength
- Heroic Quickness (to Defense, and AP)
- Heroic Toughness
- Abilities = SV / 250:
- Unequaled Obesity (for HP bonus in %)
- Abilities = SV / 400:
- Unequaled Obesity (to Strength)
Unequaled Obesity also gives a fixed +3 enc.
Awesome Presence gives (SV-75)/25 awe. That's exactly the same formula to determine how Awe from magic items that raise normal leadership is being calculated.
Heroic Stupidity also halves magic skill, like being mute.