Þat erumk sent, at snemma
sonr Aldafǫðrs vildi
afls við úri þafðan
jarðar reist of freista.
Þat erumk sent, at sonr Aldafǫðrs vildi snemma of freista afls við reist jarðar, þafðan úri.
It is conveyed to me that the son of mankind’s father [= Óðinn > = Þórr] soon wanted to try his strength against the twisted thing of the earth [= Miðgarðsormr], pounded by water.
case: nom.