The creepy bones structure featured in “The Buddy System” (season 3, episode 5 of The Venture Bros.) inside the E-deb biodome, is it from somewhere else or just a random spooky totem?

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The creepy bones structure featured in “The Buddy System” (season 3, episode 5 of The Venture Bros.) inside the E-deb biodome, is it from somewhere else or just a random spooky totem?
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