U-Heimdall, uMbuki, ungumlingiswa wezinganekwane zamaNorse ophethe ukuvikela i-Bifrost, ibhuloho eliphakathi kwemihlaba. Ubhekwa njengomunye wonkulunkulu abanamandla kakhulu futhi waziwa ngekhono lakhe lokubona noma yikuphi usongo ekuvikelekeni kombuso wase-Asgard. Unezinzwa ezibukhali kanye namehlo aphelele amvumela ukuthi abone yonke into eyenzekayo ezindaweni eziyisishiyagalolunye. Ngaphezu kwalokho, u-Heimdall ubuye abe nophondo lwemilingo olubizwa ngokuthi i-Gjallarhorn angaxwayisa ngalo bonke onkulunkulu uma kwenzeka ingozi.
Ibhekwa njengonakekeli we-Bifrost futhi ihloselwe ukuyivikela kunoma yikuphi usongo lwangaphandle noma lwangaphakathi. Unesibopho sokugcina ukuvikeleka kombuso futhi unamandla okuvula amasango phakathi kwemihlaba uma ethanda. I-Heimdall kuthiwa inamandla njengo-Thor no-Odin ehlangene, ebonisa ukubaluleka kwakhe ngaphakathi kweqembu lamaNorse.