Countess Sansuri (Storm King's Thunder)

Sansuri, a vainglorious cloud giant countess, is one of several cloud giant nobles who have retreated to their cloud castles and embarked on expeditions to map the present-day Sword Coast in search of long-lost Ostorian treasures and battlegrounds. Like archaeologists, they seek to uncover secrets of the past and retrieve relics of their ancient history to impress the gods. Sansuri, a powerful wizard, is searching for something more: a long-lost trove of dragon magic, hidden away by her ancestors. Once cloud giants knock storm giants from the pinnacle of the ordning, she plans to use her newfound magic to destroy her rivals as well as Hekaton's court. But the countess is not happy at present, because her search for the lost trove has not been going well. Frustrated, Sansuri has used powerful magic and guile to capture a bronze dragon named Felgolos. She is torturing the wyrm for information. The dragon's terrible roars can be heard emanating from Sansuri's cloud castle for miles in every direction.

Sansuri's Book.

Sansuri has a spellbook which is wraped in silver dragon hide and has several blue saphires decorating it. The spellbook has a defensive mecanism to prevent other creatures than Sansuri from taking and using the book. Whenever a creature other than Sansuri touches the book, a 7th level Geas spell (DC 18 Wisdom save) is cast on the creature. The command is to drop the book, never touch or read the book in any way, and to prevent anyone else than Sansuri from touching the book, violently if necessary. If the book is opened by a creature that isn't Sansuri, then two air elementals and a cloud giant ghost is summoned and attacks the interlopers, attempting to kill them and bring the book back to Sansuri. If Sansuri is killed or a remove curse or similar magic is cast at 7th level or higher, the defensive mechanism is removed. When the defensive mechanisms activates, they are suppressed for the next 24 hours, after which the mechanisms are renewed. The book contains the following spells: 

1st level: alarm, identify, magic missile, shield, thunderwave, unseen servant

2nd level: arcane lock, continual flame, gust of wind, invisibility, knock, mirror image

3rd level: dispel magic, glyph of warding, haste, hypnotic pattern, lightning bolt, sending

4th level: fabricate, ice storm, Leomund's secret chest, Mordenkainen's faithful hound, stoneskin

5th level: Bigby's hand, cloudkill, geas, wall of force

6th level: globe of invulnerability, guards and wards, true seeing

7th level: Mordenkainen's sword, reverse gravity, Sansuri's simulacrum (see below)

Sansuri's version of the simulacrum spell allows her to create multiple duplicates of the same creature-but it requires powdered diamond worth 5,000 gp as an additional material component. The powdered diamond, like the powdered ruby also needed to cast the spell, must be sprinkled over the duplicate and is consumed by the spell.

The cloud giant countess, Sansuri, is the current master of one of the few remaining flying castles, Lyn Armaal. Each time a new master of Lyn Armaal is chosen, the new master must magically bond with the flying castle, gaining control of it. Since countess Sansuri is the current master of Lyn Armaal, she has the power to magically control and command the flying castle at will. A new master of Lyn Armaal can only be made if the current master is dead, or the current master willingly hands over control of Lyn Armaal.

While countess Sansuri is bonded to Lyn Armaal, she has the following lair actions:

Lair Actions

On initiative count 20 (losing initiative ties), countess Sansuri takes a lair action to cause one of the following effects; countess Sansuri can’t use the same effect two rounds in a row:

Arcane Wards. Sansuri can use her bond to Lyn Armaal to cause an effect similar to a guards and wards spell to affect the entirety of the flying castle, she controls the effects from the spell as if she cast it herself.

Cyclone of the Winds. Sansuri targets a space she can see within 120 feet of her, causing a cyclone to appear centered on that area. The cyclone is a 10-foot-radius, 30-foot-high cylinder. Each creature within the area must succeed on a DC 18 Strength saving throw, or take 14 (4d6) bludgeoning damage, be knocked prone, and be pulled 10 feet towards the center on a failed save, or half as much damage and is not pulled nor knocked prone on a successful one.

Spectral Servant. Countess Sansuri calls upon her ancient ancestors to aid her, she summons a cloud giant ghost in a unocupied space she can see within 120 feet of her. The cloud giant ghost acts as an ally of Sansuri and obeys her commands. The ghost last for 1 minute, until it or Sansuri is slain, or until Sansuri dismisses it as a bonus action. Sansuri can only have one cloud giant ghost under her command at a time.

Regional Effects

The region close to Lyn Armaal is warped by the castles magic, which creates one or more of the following effects:

Arcane Unstability. The land within 3 miles of Lyn Armaal is filled with strange and unstable magic.

Avian Command. Birds and avian creatures with an intelligence of 2 or lower that are within 1 mile of Lyn Armaal become unnaturally friendly and docile towards cloud giant's and their allies.

Calm Weather. The weather within 1 mile of Lyn Armaal is calm and nice, there cannot be unstable weather in that area unless magic from a cloud giant is used to change it.

If Sansuri dies, these effects end over the next 1d10 days. If another master bonds with Lyn Armaal then these regional effects take effect once more.