Dragonfly (5e Creature)
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Medium dragon, neutral
Dragon's Resistance. The dragonfly has resistance to a type of damage based on the colour of dragon that it is a hybrid of (choose or roll a d10): 1-2, acid (black); 3-4, cold (white); 5-6, fire (red); 7-8, lightning (blue); 9-10, poison (green).
Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 8 (2d6 + 1) piercing damage.
Breath Weapon (Recharge 5-6). The dragonfly exhales energy corresponding with the colour of dragon that it is a hybrid of in a 15-foot cone (green, red, or white) or a 30-foot line that is 5 feet wide (black or blue). Each creature in that area must make a DC 11 Dexterity (black, blue, or red) or Constitution (green or white) saving throw, taking 18 (4d8) damage of the type that it resists on a failed save, or half as much damage on a successful one.
Dragonflies are hybrids of the insects of the same name and true dragons; typically the most common chromatic dragons, though dragonflies that are hybrids of metallic dragons or rarer types of dragon do exist. They outwardly resemble the insects of the same name, though they have several distinctly draconic traits, most noticeably their heads, that look almost exactly like those of the dragons they are hybrids of, and they possess the ability to unleash harmful energy in a similar manner to true dragons.
Draconic Origins. Dragonflies can be created in a bizarre ritual that involves a living dragonfly and a single scale from the dragon that the hopeful creator wishes to create a hybrid of, though dragonflies can breed with others of the same type. Dragonflies created through magic are fiercely loyal to their creators, though wild dragonflies are very aggressive, and must be raised and trained from hatching, otherwise they recognise no creatures as masters. Dragonflies are most comfortable in regions that their dragon counterparts can usually be found in—for example, blue dragonflies prefer to inhabit warm regions, while black dragonflies prefer to inhabit swamps.
Insect Dragons. Some dragons willingly donate their scales to magically-inclined servants so that they can create powerful and easily-controlled guards. Even wild dragonflies respect true dragons of the type that they are hybrids of, and won't willingly attack or harass them. Some dragons even dedicate sections of their lairs to raising dragonflies, and release them when their lairs have unwanted guests.