Lunar Morph- check out Zoaid and you'll see Xmens, EZ's and a few others that all share similar patterning, but basically they're all a morph of Lunars.
That said, true Lunar Eclipses (pure black disk, bright orange rim) are an extremely nice zoa, and not that common seemingly (most all "lunars" have some sort of speckling or pattern or a colored mouth.)