See ethereal. The ethereal dragon can see into the ethereal plane around their location. 

Ethereal immunity. The ethereal dragon is immune to all natural harmful effects in the ethereal plane for example ethereal cyclones don't effect them. 

Multi attack. The young ethereal dragon makes two claw attacks and a bite attack. 

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., 1 target. Hit: 13 (2d10 + 2) piercing damage. 

Claw. Melee Weapon Attack: +4 to hit, reach 5 ft., 1 target. Hit: 9 (2d6 + 2) slashing damage. 

Ethereal force breath (Recharge on 5/6). The ethereal dragon exhales a blast of cyan energy in a 30ft cone. Each creature that is within range must make a DC 12 Constitution saving throw or take 38 (11d6) force damage. This breath weapon also hits targets on the ethereal plane and on a successful saving throw a creature takes half damage.