Adult Topaz Dragon

Amphibious. The dragon can breathe both air and water.

Fabricate (1/Day). The dragon can cast fabricate, requiring no spell components and using Intelligence as the spellcasting ability.

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Multiattack. The dragon makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 3 (1d6) necrotic damage.

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.

Desiccating Breath (Recharge 5–6). The dragon exhales yellowish necrotic energy in a 60-foot cone. Each creature in that area must make a DC 17 Constitution saving throw. On a failed save, the creature takes 35 (10d6) necrotic damage and is weakened until the end of its next turn. A weakened creature has disadvantage on Strength-based ability checks and Strength saving throws, and the creature's weapon attacks that rely on Strength deal half damage. On a successful save, the creature takes half as much damage and isn't weakened.

Change Shape. The dragon magically transforms into any creature that is Medium or Small, while retaining its game statistics (other than its size). This transformation ends if the dragon is reduced to 0 hit points or uses a bonus action to end it.

Psychic Step. The dragon magically teleports to an unoccupied space it can see within 60 feet of it.

Legendary Action Uses: 3. Immediately after another creature's turn, The dragon can expend a use to take one of the following actions. The dragon regains all expended uses at the start of each of its turns.

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:

• Beguiling Whisper. The dragon telepathically whispers to one creature within range of the dragon's telepathy. The creature must succeed on a DC 15 Wisdom saving throw or be charmed by the dragon until initiative count 20 on the next round. A creature charmed in this way obeys to the best of its ability any command the dragon issues that isn't directly harmful to the creature.

• Cancellation. The dragon chooses an active spell of 5th level or lower that it's aware of in the lair and ends the spell.

• Negative Energy Infusion. Up to two creatures the dragon can see within the lair must each succeed on a DC 15 Constitution saving throw or take 14 (4d6) necrotic damage. Negative energy then infuses the lair until initiative count 20 on the next round. While the infusion lasts, creatures in the lair other than the dragon can't regain hit points.

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

• Crystal Profusion. Natural stone within 6 miles of the lair grows plentiful crystal formations and veins of topaz gemstones, particularly underground.

• Negative Energy. When a creature finishes a long rest within 6 miles of the lair, the creature must first succeed on a DC 15 Constitution saving throw or be unable to reduce its levels of exhaustion or regain spent Hit Dice. Creatures resistant or immune to necrotic damage are immune to this regional effect.

• Thriving Wildlife. Giant squid are attracted to the sea within 6 miles of the lair, migrating and hunting there in large numbers.

• Watery Sight. Water within 6 miles of the lair is a conduit for the dragon's psionic presence. As an action, the dragon can cast the clairvoyance spell, requiring no spell components and targeting any body of water in that region.

If the dragon dies, the population of giant squid in the region returns to normal levels over the course of 1d10 days. The existing abundance of crystals and topazes remains, but new ones form at a normal rate.