Amphibious. The dragon can breathe air and water.

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee weapon attack. +4 to hit, 10ft reach, 2d10+4 piercing damage

Claw. Melee weapon attack. +4 to hit, 5ft reach, 2d6+4 slashing damage

Breath Weapons [rollable](Recharge 5–6);{

Desiccating Breath. The Topaz dragon inhales sharply, drawing the water from within all creatures within a 60ft cone out of their bodies. Each creature in that area must make a DC 15 Con save or take 18d8 necrotic damage, half as much on a successful save. On a failed save, the creature is weakened and has disadvantage on Strength-based ability checks and Strength saving throws. The creature's weapon attacks that rely on Strength deal half damage. On a strength save it only takes the half damage

Repulsion Breath. The dragon exhales repulsion energy in a 30-foot cone. Each creature in that area must succeed on a DC 15 Strength saving throw. On a failed save, the creature is pushed 30 feet away from the dragon.