Skeletal Spikes (Necromancy)
Level: Mage 5
Mana: 45. Persistant. Base Success: 100%.
  This spell causes the target's bones to warp and writhe until large, wickedly sharp spikes burst forth from under its skin. These bony spikes grant three additional goring attacks, each one of which deals 1d6 piercing damage, as well as the multiattack feat. Only undead and constructs can be targeted by this spell.