For our first draft we decided to use sound effects that are royalty free. We found these on an excellent website called SoundBible.com.
We found a perfect slashing sound for our film which included the sounds of blood gushing.
However, in our draft 2 we will be using foley effects to replicate these sounds.
We will be using a chisel and a watermelon/cabbage to create the stabbing sound effect along with the sounds of bones breaking.