Both worlds have the same creatures to hunt, tame and receive nourishment from. Here are some of them:

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Animals – the least smart; easiest to catch; can last a half a day

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Humans – smarter than the animals, but typically the most stupid; easily seduced; very nutritious; can last for a week

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Centaurs – Much smarter, stronger and faster than humans; the most nutritious; can last for two weeks; difficult to catch

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Dragons – very difficult to find and catch; can be tamed; feeds a whole city for a month