The Mist Covered Highlands is a magic site that is always visible after taking a province and provides one air gem per turn. More importantly, it's an extensive event chain that unfolds on the site, causing several attacks from independent phantasmal creatures before giving you recruitable Wind Masters.

Starting with turn 20, there's 3% chance per turn for the event chain to start with the event:

• People have been disappearing in the area around the highlands.
  +5 Unrest, 1% population dies. Event chain starts.

An identical "common bad" event, which does not initiate the event chain, can also happen. The mostly inconsequential events that can happen before the event chain starts are:

• People have been disappearing in the area around the highlands.
  +5 Unrest, 1% population dies.
• Travelers have disappeared in the mist covered highlands. The thick mists there seem almost unnatural.
  +1 Magic.
• Some extra gems have been found in the Mist Covered Highlands this month.
  +1d3 air gems.
• A man has appeared. He seeks to unveil the secret of the Mist Covered Highlands.
  Free Cloud Mage with a low-level item. Can happen only once, with 5% chance per turn.

The event chain can only happen once in a game, although there several Mist Covered Highlands can exist.

After the event chain has started, there is a 25% chance per turn for the first phantasmal attack.

• Phantasmal warriors have appeared from within the Mist Covered Highlands. They seem directed by an unknown force of will.
  Attacked by 4d6+1 Phantasmal Warriors. The event chain continues.

After the first attack, there is a 25% chance per turn for the second phantasmal attack:

• Phantasmal warriors and beasts are emerging in great numbers from the Mist Covered Highlands.
  Attacked by 2d6+1 Phantasmal Warriors, 2d6 Phantasmal Wolf and 2d6 Phantasmal Beasts. The event chain continues.

After the second attack, there is a 25% chance per turn to find:

• One of your agents has investigated the magic of the Highlands and, when lost in its dense mists, found a cache of magic gems and an item of power. It seemed someone had hidden them on purpose.
  Item of level 0-4 and 1d6 air gems. The event chain continues.

(work in progress)

The phantasmal creatures are ethereal, but have only a single hit point. Their phantasmal weapons are negated by magic resistance.