Shimmerling Familiar? [3.5]

[Serpentine]

Hmmm, lets see...

Shimmerling
Size/Type: Fine Fey
Hit Dice: ¼d8 (1 hp)
Initiative: +6
Speed: 5 ft (1 square), fly 50 ft. (perfect)
Armor Class: 24 (+8 size, +6 Dex), touch 24, flat-footed 18
Base Attack/Grapple: +0/-21
Attack: Bite +2 melee (1d2-5)
Full Attack: Bite +2 melee (1d2-5)
Space/Reach: 1/2 ft./0 ft.
Special Attacks: —
Special Qualities: Hive mind, low-light vision
Saves: Fort +2, Ref +6, Will +4
Abilities: Str 1, Dex 22, Con 11, Int 1, Wis 15, Cha 18
Skills: Hide +36, Listen +2, Move Silently +6, Spot +2
Feats: Weapon Finesse
Environment: Temperate forests
Organization: Solitary, glimmer (5-20) or dazzle (20-200)
Challenge Rating: 1/10
Advancement: —
Level Adjustment: —

A naked and glowing elfin creature only 4 inches tall balances on the leaf before you, and as you watch, it spreads dragonfly wings.

Individual shimmerlings are miniscule and nearly mindless fey that feed on pollen. It looks like a 4-inch tall elf with dragonfly wings. Its skin and hair are the same colour as the glow it gives off, which can be any colour of the rainbow.
A shimmerling weighs 1 ounce.
Shimmerlings speak Sylvan.

Combat
An individual shimmerling is practically harmless. It is more likely to hide than to attack.
Hive Mind (Ex): Individual shimmerlings can sometimes mass together into a swarm. When they do so, they form a hive mind, giving them an intelligence score of 7, as well as various other abilities. A group of shimmerlings large enough to obtain this hive mind becomes a shimmerling swarm (MMIII p. 152).


How's that? Incidentally, it would work quite well, with only minimal tweaking, as a Labyrinth fairy.
edit: Oh, and what benefit should it give its master?