King Horik's Demise
King Horilk plotted against Ragnar throughout most of Vikings Season 2. Not only did Ragnar kill the manipulative king, but he slaughtered his entire family as well. Bjorn walked in to find a room full of dead young women and children.
Uncle Britwulf's Head
Ragnar and his men easily overpowered Kwentrith's Uncle in Mercia. Though she watched Floki kill her abusive uncle, Kwentrith asked Rangar for his head as proof. She later unleashed all her anger on it by repeatedly stabbing the decapitated head and tossing it away.
Mercian Head Decorations
Princess Kwenthrith's uncle was just the first head Vikings Season 3 Episode 2 gave us. In order to scare the bejesus out of her brother's troops, Ragnar decorated his ships with Mercian heads. It's a safe bet Kwenthrith's brother, Burgred, pooped in his pants at the sight.
When Torstein was wounded early on, it was clear the character's days were numbered. However, first he had to suffer an excruciating amputation at the hands of Floki. Torstein died bravely on Vikings Season 3 Episode 3 by charging the Hill of the Ash first, giving the Northmen a fighting chance. His place in Valhalla awaited him.
We've seen many sacrifices on HISTORY's Vikings throughout the series. However, the blood sacrifice of the bull in Vikings Season 3 Episode 3 was as unsettling a scene as any we've seen so far. Though human sacrifice by the Vikings is questionable, there's little doubt animals were sacrificed as part of their rituals and beliefs.