Seikoro Extension (星コロ　ミニ拡張)

Seikoro Extension, a.k.a. 星コロ　ミニ拡張, adds star chips to the Seikoro base game. A star chip is placed at random above each constellation card in play, and whoever places the fifth cube on a card to finish it receives the chip as a bonus in addition to the points scored for their places occupied on the card.