Hoo-boy. This is one ridiculous movie. After Guillermo Del Toro's excellent work on Blade 2, they handed the keys of this superhero/vampire franchise over to David Goyer. Goyer had written the first two movies and has worked on a ton of comic book movies. This, somehow, did not make him the man for the job. After Blade (our half-human/half-vampire hero) had faced such dangers as a vampire cult and a group of vampires that only feed on other vampires, the logical next step was to throw him against Dracula (Dominic Purcell of Prison Break and Legends of Tomorrow fame). A roided out Dracula was not exactly scary.
The cast is full of funny ringers like Patton Oswalt, Parker Posey and Ryan Reynolds as a vampire hunter. The movie does succeed in the comedic moments but flies off the rails in the horror and action sequences. While the Blade movies were never the scariest things on earth, they stuck close to their horror roots so the action scenes always had a darker edge to them. This third movie just goes straight for campy action and one-liners. I would recommend this only if you are a completist who needs to finish the trilogy.