Crepuscular Dragon Wyrmling

Keen Senses. The dragon has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Magic Resistance. The dragon has advantage on saving throws against spells and other magical effects.

Limited Telepathy. The dragon can magically communicate simple ideas, emotions, and images telepathically with any creature within 100 feet of it that can understand a language.

One with Shadows. When you are in an area of dim light or darkness, they can use your action to become invisible until they move or take an action or a reaction.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage.

Embers.
Casting time: 1 action
Range: 20 feet (4 squares, 6 m)
Duration: Instantaneous
Throws a small flame of bluish-black fire at a creature. On hit deals 1d8 fire damage.
As a dragon wyrmling they are not always able to create the flame so it is always rolled with disadvantage. In case they already has disadvantage, their proficiency bonus is deducted.

Fire spreads around corners. The fire ignites flammable objects in the area that are not held or carried. As a weak flame it is easy to extinguish.