This is the finished movie

As the first native girl approaches a cliff, she sees that there is no way across. She throws a fit and at first, does not notice the swamp creature behind her. When she does sense her unwanted guest the heads of the creature multiplies. One of the heads is destroyed by the second native girl's magic arrow. From another angle she fires two more arrows, midway through flight the ordinary arrows changes into a row of spikes that pulverizes the next two heads. The first native girl attacks the remaining two using a burst of speed and slashes right through them. The energy from her weapon looks like a single stream of light. As she turns her back a sixth head tries to sneak in, but she reacts in time, cutting it in half. The body forms a temporary bridge and she and her friend are able to cross.