I tested turn 2 (the very first hosting of the game) events in EA and MA for a bit with some bad scales and saw:
- Brigands (30 unrest)
- Hurricane (30 unrest)
- Ill Omen (30 unrest)
- Gadite rebel set your slaves free
- Frost has destroyed the crops. -80 gold, 10 unrest
- An assassin has tried to eliminate one of your commanders
- People are restless and on fifth left (-20% pop), 0 unrest
- Famine struck the land (-20% pop, -100 gold, 100 unrest) <--- Ooh, nice!
- Plague struck the land (-50% pop, 10 unrest)
- People led astray (-dom)
- Heavy snowfalls (-100 gold)
- Blight (-5% pop, -80 gold, 10 unrest)
- Magic is fading
- Lab destroyed
- Demon possessed a herd of swine (30 unrest)
- Sharks caused panic (30 unrest)
- Thief stole gems
- Trolls ate some travelers (-50 gold, 10 unrest)
- Vampire Count attacked province <-- he killed Ashdod's PD
So, it looks like barbarians and knights are out, I would have noticed them. Caspar is pretty rare, so I probably need to test more. Same with the Ancient Presence.
But on the very first hosting, you can get the (-20% pop, -100 gold, 100 unrest) famine event, and also the Vampire Count can attack your home province, and your lab can burn down.