Armor Class 17 (natural armor)
Hit Points 75 (10d8 + 30)
Speed 30 ft., fly 60 ft., swim 30 ft.
Saving Throws DEX +2, CON +5, WIS +3, CHA +5
Skills Arcana +7, Perception +5, Persuasion +5, Stealth +2
Damage Resistances force, psychic
Condition Immunities frightened, prone
Senses blindsight 10 ft., darkvision 120 ft., passive Perception 15
Languages Draconic, telepathy 120 ft.
Challenge 4
Amphibious. The dragon can breathe both air and water.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) piercing damage plus 4 (1d8) force damage.
Singularity Breath (Recharge 5–6). The dragon creates a shining bead of gravitational force in its mouth, then releases the energy in a 15-foot cone. Each creature in that area must make a DC 13 Strength saving throw. On a failed save, the creature takes 22 (5d8) 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.
Fizban's Treasury of Dragons, p. 162