https://www.fxelements.com/products/blood-splatter-pack-1

Make blood the star of the show with these premium blood splatter special effects clips. We selected a wide variety of splatter shapes and behaviors to best match any situation. These clips are perfect for blood being sprayed onto a surface, for example from a violent body hit. We used stunningly accurate Zeiss lenses to capture these blood effects for their true precision in reproducing shapes, even the finest ones. If larger splatter is needed, check out our "Blood Splatter - Pack 2".