The wyvern of revenge is a physical familiar that is attracted to resentment, and sometimes fear. it appears to be a traditional western dragon, only with no front talons; using the tips of it's wings to walk; roughly the size of an adult human. it is only visible to the Person it has bonded with, but can choose to make itself appear to others at will. it will choose a person who desires revenge, or has a reason to want revenge, and protect them as it helps them carry out their vigilante justice