This is why they're legendary.
Strong. Deadly. Terrifying.
Suddenly appearing off the coastline in their dragon-headed longships, half shrouded by low-hanging clouds as they approach the shore. Monsters of the mist.
No wonder the villages they attacked were paralyzed with terror. Can you imagine a horde of these guys (anywhere from sixteen to seventy or more depending on the size of their ship) descending on your home? They were highly skilled warriors and determined to accomplish what they had set out to do. If you were in their way, they took you out of it or died trying.