Hand Fang

Handfang (Level 2 Necromancy): You create a fanged, biting mouth in the palm of your hand.
 
Casting Time: 1 Action.
Effect: When you lay your hand upon a creature, the mouth bites it doing 3d6 necrotic damage. If the target makes a successful Dex save, he takes only half damage.
If the target fails it's Dex 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.
At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, it does an additional 1d6 damage for each level above 2.