Vial of Osmium is an item in Monster Carnival Island.

Role on Monster Carnival Island

After you try the weight-guessing game at the carnival, you go to Dr. Dan to ask for something "small but heavy" to trick the weight-guesser. You will find the vial of osmium amongst his mail. After this, you go back to the weight-guessing game and trick the weight-guesser.


  • Osmium has the highest density of any element.

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