| 「 | 眾神所渴求的頭銜，唯一神，為星杯的歸屬者所擁有。 | 」 |
星杯 (スーニーアスター, sūnīasutā, Suniaster)是傳說中上古時期的神器，擁有星杯之人將獲得唯一神的頭銜和凌駕於十六種族之上的絕對力量。
歷史
對星杯的追求被認為是神靈種發動大戰的主要原因。星杯已經存在了數億萬年，但里克發現它只是賦予這個迪司博得上所有知性生命魔法的精靈迴廊的另一種稱謂。所以里克推斷，如果有人能夠支配這個星球的核心——精靈迴廊的話，那麼他便擁有即使說超過唯一神也不為過的力量。
為了實現這個目的，里克花了一年時間小心謀劃並試着引導其他種族間的戰爭。他的目標是使其他種族在某一時刻同時陷入不得不使用他們的終極武器的情況，然後這些攻擊會被休比的通行管制引導到這個星球的核心，並由此徹底摧毀精靈迴廊，然後星杯就會顯現。但最後這個方案被發現是不可能成功的（並不是指方案本身思路有問題，而是指通行管制沒有按原計劃安放到位，而且即使安放到位也會由於休比的計算誤差而導致計劃失敗）。在機凱種的幫助下，這些攻擊被導向了機凱種的部分個體（投入了十一個連結體，4802台機體犧牲），他們解析了這些攻擊並分析了所得的數據。最終，機凱種利用這些數據造出了他們的終極武器——「真典·弒星者」，並將其託付給了里克。
Using the Starslayer, Riku penetrated the planet's core and released the reserves of magic energy stored within the planet, which were compressed and gathered into a polygonal crystal RIku believed to be the Star Cup. Deeming himself unworthy of the title of One True God, Riku's strong wish for the existence of an 'ultimate gamer' and the incredible surge of magic energy pouring out from the planet's core gave birth to the final and weakest Old Deus - Tet. Promising to play a game with Riku and Shuvi in the future with a smile, Tet claimed ownership of the Star Cup and used its power to lay down the Ten Pledges, thus ending The Great War and fulfilling Riku and Shuvi's dream of a peaceful world.
According to the movie No Game No Life: Zero, the Suniaster is a Conceptual Device, which gives complete power and authority to its holder. It was made so that it would only physically appear before the most powerful existence. The Deus thus believe that the only way they can obtain it is by killing all other Deus, thus the survivor would be the most powerful existence. Riku's plan was to create a hole into the planet revealing the World's Spirit Circuit, since all the Deus were created by it.
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