Instinct: To find a way to fulfill their vow

• Haunt a location important to them in life
• Become nearly invisible
• See the letter of their vow fulfilled and depart
• Announce their vow

The Fang of the Shark was human once, but the Shark God is generous with its priests, and the high priest most of all. He is covered in the sandpaper texture of sharkskin, with teeth sharpened to vicious points...but the real terror is the horrible shark-fang dagger designed to inflict terrifying pain and, of course, the shark miracles granted to the priest by his connection to his god. The only saving grace is that the Cult of the Shark God is not ambitious; they are perfectly happy to just slaughter those they run into as sacrifices, encourage warfare in the area and so on - nothing huge. Not yet. Instinct: To destroy and consume in honor of the Shark God

• Cause terrible pain
• Call on a shark miracle