Encounter a fire elemental
Encounter the red mage
Acquire three enchantment gems
Recruit every available hero
Buy something very expensive
Give a hero a strength boost and hit an enemy afflicted with vulnerability for maximum damage
End the bandit raids by killing their leader
Unlock a top level Guildmaster spell
Witness the glory of the heirloom
Complete the game
Was that supposed to happen?
Complete the game a bit differently