In the opening scene Dracula is knocked into a large fire pit, while he walks out of the fire his face muscles and bones are seen as he heals, however the scene is in black in white so no blood is seen.
Most of the violence is between werewolves and vampires throughout. There's no blood apart from one scene.
A man draws a sword on the other. As one steps forward, the man with the sword stabs it straight through him. He bares his fangs and bites the man's neck. (The squishing sound of the sword is heard and seen protruding through his back. The actual timing of the killing is seen in silhouette but blood is seen on the vampire's mouth after.)
A man is tied to a tree and attacked by a werewolf. He manages to jump up the tree as a woman lunges towards the werewolf with a sword.
A werewolf is locked in a cage and shot at. (Goo is seen spurting from the wolf.) It escapes and chases a woman to a cliff edge. Before it attacks her, a man jumps in the way; falling off the cliff and into a river below along with the werewolf.
A werewolf and vampire fight each other. They snap and snarl at each other, flinging each other across the room. The werewolf bites into the vampire's neck. A large wound is seen, gushing black-ish blood and the vampire begins writhing around before disintegrating.
A female vampire is shot with an arrow doused in holy water. She is pinned to the roof of a building, screams in pain and disintegrates.
A female vampire is hit by hundreds of silver stakes. She is shown disintegrating as she falls through the air.
A woman stabs a female vampire in the chest with a stake. The vampire screams in pain and bubbles away in green goo.
Various other fights between vampires, humans and werewolves throughout the movie. The ones listed above are the main fight scenes.