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This egg is known to hide itself from those who seek it by blending in with its surroundings.
The Maser uses its mask for multiple purposes. The Maser is capable of mimicking other creatures' noises, so it can pass itself off as something much more dangerous. Or if the Maser is found by a predator, they can quickly hide and make noises of a less desirable creature, causing their predators to pass them by. The trick is remaining unseen.
Outside of their unique defense capabilities, Masers are vegetarian creatures that are accepting of those around them.