This silver-scaled dragon has such physical grace, it seems to flow like water when it moves.
CR 6; Size Small; Hit Dice 7d12
Change Shape (Su) A quicksilver dragon can assume any animal or humanoid form 3/day as if using polymorph.
Cold Aura (Su) An old or older quicksilver dragon is surrounded by an aura of cold. All creatures within 5 feet of the dragon take 1d6 points of cold damage at the beginning of the dragon's turn. An ancient dragon's aura extends to 10 feet. A great wyrm's aura damage increases to 2d6. A quicksilver dragon can suppress or activate this aura at will as a free action.
Lean and Quick (Ex) A young adult or older quicksilver dragon is one size category smaller than normal for a dragon of its age category and permanently gains the benefits of a haste spell. These benefits are included in the statistics above.
Light and Nimble A quicksilver dragon's natural armor bonus increases by one-half the normal amount for age categories other than wyrmling. However, the dragon's Dexterity score increases at the same rate as its Strength score instead of decreasing with age.
Paralyzing Breath (Su) Instead of a cone of cold, a quicksilver dragon can breathe a cone of paralyzing gas. Creatures within the cone must succeed on a Fortitude save or be paralyzed for 1d6 rounds plus 1 round per age category of the dragon.
Reflective Scales (Su) Any spell that targets an ancient or older quicksilver dragon but fails to penetrate the quicksilver dragon's spell resistance might be reflected. If the caster level check to penetrate the dragon's spell resistance is failed by 5 or more, the spell is reflected. If the check fails by 4 or less, the spell is merely wasted. This otherwise functions as spell turning.
True Courage (Ex) A great wyrm quicksilver dragon can fight on through pain and death. When reduced to below 0 hit points, it remains conscious, automatically stabilizes, and can continue to act (although it is staggered). If it takes damage or is the target of a spell that causes its death, it remains alive for 1 round and can act normally (it is not staggered for this final round).