Spellcasting (Psionics). The dragon casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability:
At will: dancing lights, guidance
Bite. Melee Weapon Attack: +4 to hit, reach 10 ft., one target. Hit:7 (1d10 + 2) piercing damage plus 2 (1d4) radiant damage.
Scintillating Breath (Recharge 5–6). The dragon exhales a burst of brilliant radiance in a 15-foot cone. Each creature in that area must make a DC 12 Constitution saving throw, taking 18 (4d8) radiant damage on a failed save, or half as much damage on a successful one. The dragon then gains 5 temporary hit points by absorbing a portion of the radiant energy.
Shimmering with radiant energy and brimming with life, crystal dragons enjoy an innate psionic connection to the Positive Plane that suffuses their bodies as well as their personalities with light. Though they prefer to live in desolate, frigid regions, many of them are among the friendliest of dragonkind, nurturing and optimistic.