Thor's Battle with Hrungnir
Bragi told Ægir that Thór had once gone to the east to fight trolls, when Óðin rode Sleipnir into Giantland and came to the giant called Hrungnir. Hrungnir asked who the man was in the golden helmet who was riding through the air and over the sea, adding that he had a remarkably fine horse. Óðin replied that he would wager his head its equal was not to be found in Giantland. Hrungnir said that Sleipnir was a fine horse, but maintained that he possessed one called Gold-mane that could step out much better, and losing his temper he sprang on to his mount and galloped after Oðin, intending to pay him out for his big talk. Óðin galloped on so hard that he was on the other side of a hill on the horizon in no time, but Hrungnir was in such a towering rage that, before he knew where he was, he was inside the gate of Asgarð. When he arrived at the door of the hall, the Æsir invited him in to drink: with them. He went into the hall and asked to be served with drink. The beakers Thór was accustomed to drink from were brought to him and Hrungnir tossed off both. When he was drunk, big words were not in short supply; he declared that he would pick up Valhalla and carry it into Giant-land, sink Asgarð in the sea and kill all the gods except Freyja and Sif whom he would carry off home with him. Then Freyja went to pour out more ale for him and he declared he would drink up all the Æsir had. When the Asir were tired of his big talk, however, they summoned Thór. At once Thór came into the hall in a fury with his hammer raised aloft and asking on whose authority sly devils of giants were drinking there, and under whose safe-conduct Hrungnir was inside Valhalla, and why Freyja was waiting on him, as if it were a banquet of the gods. Hrungnir looking at Thór in no friendly manner answered that Óðin had invited him to drink with him, and that he was there under his safe-conduct. Thór declared that Hrungnir would be sorry for this invitation before he left. Hrungnir said that it would not enhance Thór's reputation to kill him unarmed as he was, and that it would be a greater test of courage if he dared to fight him on the frontier at Grjótúnagarðar (stone fence house). 'I've been a great fool', he added, 'to leave my shield and hone at home; if I had my weapons we should fight a duel now. On the other hand, I pronounce you dastard if you are intending to kill me unarmed.' No one had ever challenged Thór to a duel before, so he would not on any account fail to meet Hrungnir in single combat. Hrungnir went off on his way home galloping furiously until he reached Giantland. This expedition of his and the fact that he had arranged to meet Thór won him great fame amongst the giants. They felt that it mattered a good deal which of them should prove victorious; they could expect the worst from Thór if Hrungnir perished, for he was strongest of them.
Then the giants made a man of clay at Grjótúnagarðar. He was nine leagues high and three broad under his armpits and they could not get a heart large enough to fit him, until they took a mare's, and this was not steady in him when Thór arrived. Hrungmr's heart is famous. It was of hard stone and sharp-edged and three-cornered like the runic character known as 'Hrungnir's heart' which has since been made that way. His head, too, was of stone, also the broad, stout shield which he held before him while he was standing at Gjótúnagarðar waiting for Thór. As weapon of attack he had a hone poised on his shoulder and he looked an ugly customer. At his side stood the clay giant called Mist Calf, and it was terrified. It is said that it made water when it saw Thór.
Thór went to the duelling ground, and with him Thjálfi. Then Thjálfí ran forward to where Hrungnir was standing and told him: 'You're taking a risk the way you're standing, giant, with your shield in front of you; Thór has seen you. Put it down on the ground beneath you for he will come at you from below.'
Hrungnir shoved his shield under his feet and stood on it, grasping the hone with both hands. At once he saw flashes of lightning and heard great claps of thunder; he was seeing Thór in his divine wrath. (The god) bore down on him at tremendous speed and brandishing his hammer hurled it at Hrungnir from a great distance. Hrungnir lifted up the hone in both hands and flung it against the hammer, and the hone colliding with it in mid-air was smashed to pieces. One part of it fell to the ground and all hone quarries have come from those fragments. The other pierced Thór's head so that he fell forward on the earth. The hammer Mjöllnir, however, struck Hrungnir in the middle of his head shivering his skull into small fragments, and he fell prone across Thór with one leg over Thór's neck. Thjálfi attacked Mist Calf and he fell with little renown.
Then Thjálfi went up to Thór to lift Hrungnir's leg off him, but he could not move it at all. When they heard that Thór was down, all the Asir went up to him to lift off the leg, but they were unable to do anything. After that Magni, the son of Thór and Járnsaxa (Iron cutlass, a giantess), came up to them - he was three years old then -and he flung Hrungnir's leg off Thór saying: 'What a pity I didn't come sooner, father; I reckon I'd have struck the giant dead with my bare fist if I had met him.' Thór stood up then and gave his son a fine welcome saying he would be a strong man:
'And', said he, 'I'll give you the horse Gold-mane' - which Hrungnir had had. Óðin spoke then declaring that Thór was doing wrong to give a fme horse like that to the son of a giantess instead of to his own father.