So deep is the belief in the efficacy of magic, and in magic being the only means of acquiring extraordinary faculties, that all powers of a yoyova are attributed to magic. As we saw in the training of a young yoyova, magic has to be spoken at every stage in order to impart to her the character of a witch. A full blown yoyova has to utter special magic each time she wishes to be invisible, or when she wants to fly, or acquire higher speed, or penetrate darkness and distance in order to find out whether an accident is happening there. But like everything referring to this form of witchcraft, these formulæ never come to light. Although I was able to acquire a whole body of spells of the bwaga’u sorcery, I could not even lift the fringe of the impenetrable veil, surrounding the magic of the yoyova. As a matter of fact, there is not the slightest doubt for me that not one single rite, not one single word of this magic, have ever existed.
Once a mulukwausi is fully trained in her craft, she will often go at night to feed on corpses or to destroy shipwrecked mariners, for these are her two main pursuits. By a special sense, acquired through magic, she can ‘hear,’ as the natives say, that a man has died at such and such a place, or that a canoe is in danger. Even a young apprenticed yoyova will have her hearing so sharpened that she will tell her mother: “Mother, I hear, they cry!” Which means that a man is dead or dying at some place. Or she will say: “Mother, a waga is sinking!” And then they both will fly to the spot.
When she goes out on such an errand, the yoyova leaves her body behind. Then she climbs a tree, and reciting some magic, she ties a creeper to it. Then, she flies off, along this creeper, which snaps behind her. This is the moment when we see the fire flying through the sky. Whenever the natives see a falling star, they know it is a mulukwausi on her flight. Another version is that, when a mulukwausi recites a certain spell, a tree which stands somewhere near her destination bends down towards the other tree on which she is perched. She jumps from one top to the other, and it is then that we see the fire. According to some versions, the mulukwausi, that is, the witch in her flying state, moves about naked, leaving her skirt round the body, which remains asleep in the hut. Other versions depict her as tying her skirt tightly round her when flying, and beating her buttocks with a magical pandanus streamer. These latter versions are embodied in the magic quoted above in Chapter V.
Arrived at the place where lies the corpse, the mulukwausi, with others who have also flown to the spot, perches on some high object, the top of a tree or the gable of a hut. There they all wait till they can feast on the corpse, and such is their greed and appetite that they are also very dangerous to living men. People who collect round the dead body to mourn and wake over it often have a special spell against the mulukwausi recited over them, by the one who knows it. They are careful not to stray away from the others, and, during burial of the dead and afterwards, they believe the air to be infested with these dangerous witches, who spread the smell of carrion around them.
The mulukwausi will eat out the eyes, the tongue, and the ‘insides’ (lopoula) of the corpse; when they attack a living man they may simply hit him or kick him, and then he becomes more or less sick. But sometimes they get hold of an individual and treat him like a corpse and eat some of his organs, and then the man dies. It is possible to diagnose this, for such a person would quickly fail, losing his speech, his vision, sometimes suddenly being bereft of all power of movement. It is a less dangerous method to the living man when the mulukwausi instead of eating his ‘insides’ on the spot, simply remove them. They hide them in a place only known to themselves, in order to have provision for a future feast. In that case there is some hope for the victim. Another yoyova, summoned quickly by the relations of the dying and well paid by them, will, in the form of a mulukwausi, go forth, search for the missing organs, and, if she is fortunate enough to find and restore them, save the life of the victim.