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Magical Coin (Japanese: まじかるコイン) is an ability in Densetsu no Starfy 4. It is the second Spill ability found in the game. It is taught to both Starfy and Starly by Prince Coral in Hidden Village of Koimaro, provided that Starly is exposed to the light of the Random Flower.
Using it drains all of Starfy and Starly's SP, and makes a large spinning coin appear above Starfy or Starly's head, which will eventually stop spinning. The coin has a chance of either stopping on one side marked with an illustration of a star, or another side marked with an illustration of poop. If the coin lands on the 'star', all enemies nearby will turn into big Pearls, and the Pearls will fly towards Starfy or Starly, however if the coin lands on the 'poop', all enemies nearby will turn into enemies representing the poop, which will move horizontally towards Starfy or Starly before moving off of the screen.