What foreshadows are there in Beowulf lines 452-499 where it talks about his story of the swimming match with Breca and dangers he met overcame?

The dangers Beowulf mentions foreshadow the battles he will encounter against Grendel and the dragon in the epic poem.

1. Swimming against the currents: Beowulf describes his struggles against the strong currents and how the sea "roared like a wild animal." This foreshadows the challenges he will face in his encounters with Grendel and the dragon, who are both powerful adversaries.

2. Battling the sea monsters: Beowulf recounts how he fought and killed nine sea monsters during the swimming contest. This foreshadows his future battles with monsters, including Grendel's mother and the dragon.

3. Facing the darkness: Beowulf mentions how the sea became dark and deep during his contest with Breca, and how he "could see nothing but shadows." This foreshadows the dark and dangerous environments in which Beowulf will fight his enemies, such as the monster's lair and the dragon's cave.

4. The outcome of the contest: Beowulf emerges as the winner of the swimming match, despite the challenges he encounters. This foreshadows his eventual victory over Grendel and the dragon, though it also hints at the toll these battles will take on him.

Overall, the foreshadowing in Beowulf lines 452-499 suggests that the protagonist will face daunting obstacles and fierce enemies in his quest to become a legendary hero.