Blood Knot Instructions:
Step 1: Take the two lines' ends and tie a simple overhand knot (which will be clipped off later). Then tighten to combine the two lines into one.
Step 2: Form a loop where the two lines meet, with the overhand knot in the loop. Pull one side of the loop down and begin taking turns with it around the standing line. Keep point where turns are made open so turns gather equally on each side.
Step 3: After eight to ten turns, reach through center opening and pull remaining loop (and overhand knot) through. Keep finger in this loop so it will not spring back. Hold loop with teeth and pull both ends of line, making turns gather on either side of loop.
Step 4: Set knot by pulling lines tightly as possible. Tightening coils will make loop stand out perpendicular to line. Then clip off the loop and overhand knot close to the newly formed knot.