As a bonus action, shift for 1 minute or revert as a bonus action. You gain 4 temp HP. You can attack with Fangs as a bonus action and for free when you shift.
When you hit a foe, mark it for 1 minute.
When you damage it, add 1d4 dmg 1/turn.
When you roll initiative, for 1 round: your speed increases by 10ft; you can make an extra attack that deals +1d8 dmg.
In darkness, you are not visible using only darkvision.