Moonstone Dragon Lairs:

Often, a moonstone dragon’s lair is not a single location, but rather a collection of personally significant places spread out across multiple planes of existence and connected through portals under the dragon’s control. A lair might include a secluded grove on the Material Plane, a well-protected tower in the Feywild, and even a hidden corner of the Ethereal Plane. Moonstone dragons often use locations in the Feywild as their primary residences, locations on the Material Plane for entertaining guests, and locations on the Ethereal Plane for storage. Occasionally, though, a whimsical moonstone dragon delights in shaking things up, insisting that visitors come to the Border Ethereal for a meeting or sleeping in the middle of a heavily trafficked forest on the Material Plane.

Moonstone dragons navigate their multiplanar lairs by opening portals between planes at will. They sometimes forget to close those portals, allowing the inhabitants of one plane to wander into others.

Moonstone Dragon Lair Features:

You can look to other maps in the book that the moonstone dragon is featured in as inspiration for the scattered parts of a moonstone dragon’s lair. For example, a well maintained and above-water version of a black dragon's lair tower makes a great Feywild audience chamber, while a vibrant, living version of the a green dragon lair’s enormous tree makes for a very comfortable bedchamber in a grove on the Material Plane. And features such as the cloud bridges of a silver dragon's lair can be used for the parts of a moonstone dragon’s lair that lie in the Border Ethereal.

A Moonstone Dragon’s Lair:

For their lairs, moonstone dragons look for places kissed by the moon; lonely peaks, forest clearings, and placid lakes are among their favorite sites. Their whimsical nature makes them more likely than other dragons to establish multiple lairs even at a young age. They link their scattered sites with magic portals, often splitting their time between the Feywild, the Material Plane, and the Ethereal Plane.

Lair Actions:

- On initiative count 20 (losing initiative ties), the dragon can take one of the following lair actions; the dragon can’t take the same lair action two rounds in a row:

Banish into Dream. The dragon targets a creature it can see within 120 feet of it and attempts to send that creature to a dream plane. The target must succeed on a DC 15 Charisma saving throw or be banished to a harmless demiplane until initiative count 20 on the next round. While there, the target is stunned. When the effect ends, the target reappears in the space it left or in the nearest unoccupied space.

Compulsive Dance. The dragon targets a creature it can see in its lair, and a merry waltz begins to play that only the target can hear. The target must succeed on a DC 15 Intelligence saving throw or dance until initiative count 20 on the following round. The dancing creature is incapacitated and must use all its movement to dance.

Disorienting Visions. Disorienting illusory images flit through the dragon’s lair. Each creature in the lair must succeed on a DC 20 Wisdom saving throw or have disadvantage on ability checks until initiative count 20 on the following round.

Regional Effects:

- The region surrounding a legendary moonstone dragon’s lair is altered by the dragon’s magic, creating one or more of the following effects:

Dream Communication. Whenever a creature that can understand a language sleeps or enters a state of trance or reverie within 6 miles of the dragon’s lair, the dragon can establish telepathic contact with that creature and converse with it in its dreams. The creature remembers its conversation with the dragon upon waking.

Planar Transition. The veil between planes is thinned near a moonstone dragon’s lair. Various portals link the Material Plane, the Feywild, and the Border Ethereal within 6 miles of the lair. Creatures can pass through a portal in either direction by spending 5 feet of movement.

Note 1: If a moonstone dragon dies, any portals near the his or her lair close immediately.

Note 2: use Moonstone Dragon (E) fighter subclass and Moonstone Dragon Advisor for effective playing as a Moonstone Dragon.

Note 3: set your base stats to at most 14 STR, 12 DEX, 11 CON, 14 INT, 11 WIS, and 15 CHA when starting at level one. (calculated using: moonstone dragon wyrmling base stats to base stats of Young Moonstone Dragon: +2 STR, +2 DEX, +3 CON, +2 INT, +3 WIS, +2 CHA; young moonstone dragon base stats to base stats of Adult Moonstone Dragon:+2 STR, +2 DEX, +3 CON, +4 INT, +3 WIS, +4 CHA)

Note 4: use the Jabberwock (E) fighter subclass and the Fey Toy Friend background i created in addition to Moonstone Dragon species for effective playing as a Moonstone Dragon that eventually becomes a Jabberwock.