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The Prime Power Compass is an item used to solely point towards numbers that are a prime power, meaning it will point to numbers that are powers of prime numbers, such as 7, which is 7 to the 1st power. You have a 1/5 chance of getting it after interacting with any composite number in Composite Citadel.
It resembles an ordinary compass, with all directions of North, South, East and West.
The pointer in the middle points towards any Prime Power, or the nearest Prime Power.