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Handfang is a necromancy spell that conjures a mouth in one's hand.
You create a fanged, biting mouth in the palm of your hand. When you lay your hand upon a creature, the mouth bites it. If the target makes a successful Reflex save, he takes only half damage.
If the target fails his Reflex save, you may start a grapple as a free action without provoking an attack of opportunity. If you establish a hold, the fanged mouth sinks its teeth into the target’s flesh and continues to bite for additional damage each round until the hold is broken or the spell ends.