Young Amethyst Dragon

Large Dragon (Gem), Neutral

AC: 18

Initiative: +1 (11)

HP: 168 (16d10 + 80)

Speed: 40 ft., fly 80 ft. (hover), swim 40 ft.

STR: 21 (+5)
DEX: 12 (+1)
CON: 21 (+5)
INT: 18 (+4)
WIS: 15 (+2)
CHA: 19 (+4)

Saving Throws: Dex +5, Con +9, Wis +6, Cha +8

Skills: Arcana +12, Perception +10, Persuasion +8, Stealth +5

Resistances: force; psychic

Condition Immunities: frightened; prone

Senses: blindsight 30 ft., darkvision 120 ft., Passive Perception 20

Languages: Common, Draconic, telepathy 120 ft.

CR: 9 (XP 5,000; PB +4)

Amphibious.

The dragon can breathe both air and water.

Spellcasting (Psionics).

The dragon casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 16):

1/day each: blink, dispel magic, protection from evil and good, sending

Actions

Multiattack.

The dragon makes one Bite attack and two Claw attacks.

Bite.

Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) piercing damage plus 4 (1d8) force damage.

Claw.

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

Singularity Breath (Recharge 5-6).

The dragon creates a shining bead of gravitational force in its mouth, then releases the energy in a 30-foot cone. Each creature in that area must make a DC 17 Strength saving throw. On a failed save, the creature takes 36 (8d8) force damage, and its speed becomes 0 until the start of the dragon's next turn. On a successful save, the creature takes half as much damage, and its speed isn't reduced.

Find this creature in the encounter builder

Source: Fizban's Treasury of Dragons, p. 161 - Licenses and attribution