Moon dragon

Moon dragons, also called lunar dragons or occasionally phase dragons, were a species of dragon native to wildspace regions, where they made their homes on moons.

Description
Moon dragons changed coloring over the course of thirty days, beginning with a solid, brilliant white form, then having a "shadow" appear on the left side of the dragon, that spreads over the course of 15 days until the beast is solid black in color, at which time a sliver of white appears on the left side and then spreads, again over the course of 15 days, until the dragon is once again solid white. These states of coloration effected their strength and personalities, and were called phases.

Personality
Moon dragons were evil, though their ethical outlook varied between phases. During their solid-black phase they were chaotic, while during their solid-white phase they were more lawful; in the transitional phases (and thus most of the time) they were neutral.

Abilities
Moon dragons were stronger during their solid-black phase,