Vanishing/appearing moons

In Dungeons and Dragons lore, there exists a construct called the cosmos used to define a variety of planes of existence. One of these is the Material Plane, on which our normal reality is found.

Suppose there was an Earth-like planet on the Material Plane with a disturbed cosmos, such that other planes of existence passed close to the Material Plane, close enough to create a planar bridge. This happens periodically and fairly predictably and, when a strong enough bridge forms, the encroaching plane can steal one of the planet's moons and/or give the planet a moon.

What would be the physical impact on the planet if there can be anywhere between 0 and 4 moons in orbit at any given time?

posted almost 9 years ago

Frostfyre‭

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