Lots of violence and death, but all is done with toys like Lego, so it isn't really that bad.
Blood is pretty common, but the effects are very basic and look fake.
Weapons vary from lasers, lightsabers, guns, rockets, tazers, bombs, swords, knives, and even hand to hand combat.
A lot of innocent people are killed or attacked, sometimes even by the main characters. It's done in a comedic fashion as the movie never really takes itself seriously.
A man rips out veins from a dragon. Blood goes everywhere.
A still image of a decapitated man is shown with blood everywhere and a monster standing above him with a blood covered ax.