[1.3 - Quests that Unlock Spells, Technology or Change Alliances]
I would like to see quests that can unlock new spells or technology if they are completed.
Example: A demon is guarding a temple with an ancient book of magic. Slay the demon and you can research a new summoning spell.
Example: Free the imprisoned sage and you can now reasearch phalanx spears that give you; whether attacking or defending, a first strike ability to soldiers so equipped.
Example: Rescue and return the King's daughter to her father and her Empire fraction will never attack you; as long as she lives and you don't attack them.