Amethyst dragon

From Ardrana

Amethyst dragons are wise and regal, with a detached air, and ignore what they consider to be petty squabbles between good and evil, law and chaos. They live on the shores of isolated mountain lakes and pools, some in caves beneath the water. When hatched, amethyst dragons have lavender skin with small scales of a light, translucent purple. As they grow older, the scales gradually darken. Adults are a sparkling lavender in color.

An amethyst dragon's breath weapon is a faceted, violet lozenge, which it can spit into the midst of enemies, up to 75 feet away. The lozenge explodes with concussive force, causing damage to all creatures within 60 feet of the impact. They are born with an innate water breathing ability and an immunity to poisons. They are also immune to force attacks and effects.

Amethyst dragons are good parents, but believe their young should fend for themselves as soon as they become young adults. Amethyst dragons dislike red and white dragons, and consider silver and copper dragons to be foolish. They prefer to eat fish and a large number of gems, and are not inherently enemies with any life form.

Note: Amethyst dragons originally appeared in this form in the 2nd Edition Monstrous Manual for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.