ɪn ˈɔːɹdɚ tʊ ɛskˈeɪp ðə mˈɪstɪkəl tɹˈæp, ðeɪ hædtə kəmplˈiːt ɐ sˈɜːkəl ʌv mˈuːn stˈoʊnz, sˌoʊ ɐ kɹˈiːtʃɚ fɹʌmðɪ ˈʌndɚwˌɜːld kʊd ˈæksɛs ˌaʊɚ wˈɜːld.
In order to escape the mystical trap, they had to complete a circle of moon stones, so a creature from the underworld could access our world.