There are several battle sequences with medieval style combat with swords, spears, and shields but blood is mild and the fights are not too graphic.
A young woman is tied to a wooden contraption on a beach and offered as a sacrifice to a sea serpent. We see her scream in terror before she is eaten in one bite. No blood.
A young woman slaps a young man when he kisses her.
A few minor scuffles between Vikings during a feast for the purpose of entertaining the crowd. Three challengers are quickly defeated by a much stronger warrior from a rival clan but the fourth is able to beat him. No blood, but heavy punches and wrestling style attacks and throws. One challenger tries to use a fire poker as a weapon but Stomper (the big warrior) simply grabs it and head butts the other Viking down. We hear Stomper's hand sizzling from grabbing the burning metal.
A group of armed soldiers attack a young man in the woods. He shoots two with his crossbow and manages to kill the other with his blades. Minor blood is shown.
Soldiers from an enemy clan attack a village and several people are killed in the ensuing battle. The most graphic death shows a man impaled from behind with a sword. We see the bloody tip come of out his chest before the sword is yanked out and he falls to the ground dead.
A young woman is kidnapped by a rival Viking clan. They kill the guards protecting her and drag her from her village roughly.
A man threatens a younger man several times throughout the film, at one point saying he will tear out the boy's heart and feed it to the fishes.
A man threatens to cut off an old man's fingers if he tries to intervene with their quest. He grabs the man's hand and is ready to cut off his thumb but the old man finally gives in to their request and lets them barrow his boat so they leave him unharmed.
During a storm at sea, several Vikings are forced to jump ship before they run into some dangerous rock formations. We later learn that three of them drowned off screen.
A young woman is bound and taken to a king's throne room. He explains she is going to be sacrificed to their god and she attempts to escape. She steals a guard's dagger and threatens to kill a servant, but ends up just making a run for it instead. She is quickly captured again and taken to a dungeon.
There is a battle between two groups of Vikings with one group being enemy soldiers and the other containing our heroes. Our heroes' group quickly kills all but one of the soldiers and they take him prisoner. They threaten to cut off his limbs until he agrees to lead them to the princess they are trying to rescue.
A semi-main character is mauled in the neck by a wolf and dies of his injuries. Some blood is shown.
A young man kills a wolf by stabbing it through the neck. Very quick and no blood is visible.
A young woman is tied to a wooden contraption on the beach and she insults her captors. The king slaps her twice as punishment.
Three Vikings attack another group of Vikings to rescue their princess. They kill nearly the entire enemy party, including the king. He is stabbed through the abdomen and then it cuts away as he is beheaded off screen before it cuts back to show his headless body falling to the ground. Blood is shown.
A giant sea serpent rises out of the water and sees that there is no princess for him to eat. He eats an old man standing on the beach instead as the man laughs maniacally.
A dying man holds his adopted daughter's hand as he struggles to speak. We see blood in his mouth and on his lips as he tells her he failed her. He dies a few moments later.
A man roughly grabs a young woman by her hair and drags her out of the village. She screams and cries in pain.
A man is killed by another using a crossbow. He's shot three times before he finally goes down.
A man tries to stop a young man from rescuing his friend. He pulls the boy off his horse and throws him to the ground. The young man throws dirt in his attacker's eyes and then hits him across the face with a metal rod.
A man is burned alive when a sea serpent breathes fire at him. Not graphic but we see his fiancé screaming and crying in horror as she watches him die.