Dragons of Worldcenter: Mercury Dragon

 Many beautiful dragons from older editions didn't make in time to be updated to Pathfinder 1E. I am trying to fill this gap, also because I used them in my novels and they are now part of my own setting.
The mercury dragon represent the element of light in my world. I mostly based this conversion on Skip Williams' version for 3e in the Monster Mayhem web article series.
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Mercury Dragon
This long and slim dragon has a narrow silvery body and a slender, whiplike tail. The wings seem mirror bright. It moves and flies with unusual rapidity.
CG dragon (fire)

Base Statistics
CR 2; Size Tiny; Hit Dice 3d12
Speed 60 ft.
Natural Armor +2; Breath Weapon line, 2d6 fire
Str 11, Dex 14, Con 13, Int 10, Wis 11, Cha 10
 

Special Abilities
 

Breath Weapon (Su): A mercury dragon’s breath weapon is a line of intense light that burns whatever it touches, dealing fire damage.
 

Brilliance (Ex): As a standard action, a mercury dragon can use the mirror-bright membranes of its wings to reflect and concentrate available light into a beam of dazzling brightness. To use this power, the dragon needs light as bright as an overcast day or clear, moonlight night. Torchlight or candle light is insufficient.
The power creates a thin beam the dragon can aim at a single target within 30 feet per age category of the dragon. The target is blinded for 1d4+1 rounds unless it makes a Reflex save (DC 10 + ½ the dragon's Hit Dice, + the dragon's Dexterity modifier). If not using this technique as a weapon, the dragon can create a cone of light as bright as a daylight spell up to 60 feet long per age category of the dragon. The cone lasts 3 rounds.
 

Change Shape (Su): An adult or older mercury dragon can assume any animal or humanoid form 3/day as if using polymorph.
 

Compression (Ex): A mercury dragon can move through an area as small as one-quarter its space without squeezing or one-eighth its space when squeezing.
 

Graceful Flight (Ex): A young adult or older mercury dragon's aerial maneuverability is one step better than normal.
 

High Jump (Ex): A very young or older mercury dragon receives a racial bonus equal to its age category on Acrobatics skill checks made to jump.
 

Mercurial Shape (Sp): A great wyrm mercury dragon can assume a semi-solid form at will, as ooze shape III.
 

Protected Sight (Ex): A young or older mercury dragon is immune to any effect that would blind or dazzle it. It also gains +3 racial bonus on saving throws against any light or pattern effect.
 

Spell-Like Abilities (Sp): A mercury dragon gains the following spell-like abilities, usable at will upon reaching the listed age category.

Very Young- gaze screen*
Juvenile- mirror image

Old- telekinesis
Ancient- scintillating wall
Wyrm- project image
Great Wyrm- prismatic spray

Age Category	Special Abilities	Caster Level
Wyrmling	Brilliance, compression, fire subtype	—
Very young	gaze screen, high jump	—
Young	Protected sight	1st
Juvenile	mirror image	3rd
Young Adult	DR 5/magic, graceful flight, spell resistance	5th
Adult	Change shape, frightful presence	7th
Mature adult	DR 10/magic	9th
Old	telekinesis	11th
Very old	DR 15/magic	13th
Ancient	scintillating wall	15th
Wyrm	DR 20/magic, project image	17th
Great wyrm	Mercurial shape, prismatic spray	19th

Environment temperate and warm mountains and underground
Organization solitary

Treasure triple

Playful and unpredictable, mercury dragons love bright light and all sparkly things. Though benevolent and friendly towards good creatures, they can be mischievous and prone to practical jokes.

Gaze Screen
School abjuration (light); Level arcanist/sorcerer/wizard 2, cleric/oracle/warpriest 2, druid/hunter 2, mesmerist 2, psychic 2, witch 2

Casting
Casting Time 1 standard action
Components: V, S 

Effect
Range touch
Target 1 living creature
Duration 10 minutes/level
Saving Throw Will negates (harmless); Spell Resistance yes (harmless)

You create a shimmering, mirrorlike area in the air before the recipient's eyes. The area moves with the recipient, and does not affect the recipient's vision. If the recipient is subjected to a gaze attack while the spell lasts, there is a 50% chance that she does not need to make a saving throw against the attack (just as if she had averted his eyes). The foe with the gaze attack does not have concealment from the recipient. The recipient gets no additional protection from averting his eyes while the spell lasts, though he can shut his eyes and entirely avoid the gaze.

Mercury Dragon Bloodline

A mercury dragon is considered a true (metallic) dragon for the purpose of a sorcerer or bloodrager taking the draconic bloodline, an oracle taking the Dragon mystery, the Draconic Heritage and Draconic Manifestation feats, and similar effects. Its energy type is fire, and the granted breath weapon is a 60-foot line.