Eru Ilúvatar was the creator in J.R.R. Tolkien’s Legendarium who’s similar to the Judeo-Christian God in many aspects. The Creator of Arda which is the Planet that encompasses Middle Earth and Valinor. He is also the creator of the Ainur, which include the Godlike Valar and the angelic Maiar. He created the Elves to tend to Arda, and the humans who would be given the gift of Mortality to transcend with him. All powerful and merciful.