Air and water immunity. The tun mi lung is immune to all attacks and effects based on air or water. 

Divine winds (1/week). As an action, In a 20 mile radius centered on the young tun mi lung has very very harsh winds and any objects that are not as tough as stone will be taken by the typhoon created by the winds and any creature not under cover must make a dc 13 Strength saving throw. On a failed save a creature is picked up by the winds and lifted 1d20 x 10ft up in the air and thrown in a random direction 1d12 x 10ft away and they take the resulting fall damage. This effects a creature every second round and the typhoon dragon is required to concentrate on this as if it was a spell  and has a duration of 6d4 hours average of 30 (10d6) bludgeoning damage. 

Flight orb. Though wingless, tun mi lungs can fly magically due to a magic black pearl embedded in their brains. If removed from the dragon, this pearl loses its magic but is still worth 1,000 gp. The dragon can cease or resume flight as a free action.

Magic Resistance. The tun mi lung has advantage on saving throws against spells and other magical effects.

Amphibious. The tun mi lung can breathe air and water.

Detect thoughts. The tun mi lung is constantly detecting the thoughts of creatures within 20ft of them. See the spell of the same name if a creature attempts to resist. 

Alternate form. Lung dragons can assume any humanoid form of Small to Large size as a standard action. This ability is similar to the polymorph spell but allows only humanoid forms. Whilst in this form they have advantage on all checks to hide their true self. 

Innate Spellcasting. The young tun mi lung's innate spellcasting ability is Wisdom (spell save DC 15). The young tun mi lung can innately cast the following spells, requiring no material components:

At will: invisibility, plane shift

3/day: darkness 

Multi attack. The young tun mi lung makes two claw attacks and one bite. 

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., 1 target. Hit: 13 (2d6 + 7) piercing damage. 

Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., 1 target. Hit: 11 (1d8 + 7) slashing damage.