Here's how I did it in Number Appearing if that helps:
Alternative race: Lycanthrope
The sorcerer-kings called it “lycanthropy” in their day—a creature that was both man and beast. It is said to be passed on by a bite, but dark curses and superstitions abound.
Bear, boar, wolf or spider? Lycanthropes come in a variety curses. But they all have banes that they struggle with.
Names:
Angmar, Fantak, Firelegs, Gunther, Hellrunner, Lily, Ravnar, Rex, Ripper, Samantha, Shabby,
Stormbite, Stripes, Tawar, Whistle, Windrunner.
Look:
Red eyes, hungry eyes, piercing eyes. Forest black body, ghostly grey body,
raging white body, fierce striped body. No tail, bushy tail, scrawny tail, whip tail.
Alternative bonds:
I will gift _________ with 'the change.'
I know a secret about __________.
___________ knows my banes.
___________ left me for dead.
Choose a normal form in which you usually appear: dwarf, elf, goblin, halfling, hobgoblin,
human, kobold, orc, etc.
Choose an animal form: bear, boar, fox, giant lizard, giant rat, giant snake, giant spider,
All Lycanthropes have these three moves:
o Animal form: You can change between your normal and animal forms whenever you like, unless you are affected by a bane. In animal form you and your possessions meld into a perfect copy of the animal and you have their innate abilities and weaknesses. You still use your normal stats but some moves may be harder to trigger—a wolf will find it hard to open a door for example.
If you are affected by a bane you must immediately change to your animal form and stay in it until the bane no longer affects you. A Druid Lycanthrope cannot use Shapeshifter when affected by a bane.
Choose three banes:
o The full moon
o No moon
o Less than half hit points o Inebriation
o Anger
o Fear
o Passion
o Close to fire
o Touch of silver
o Touch of cold iron o Touch of wolfsbane.
o The Moon Gift: When in animal form your bite does class damage. NPCs you kill with your bite might return as a Lycanthrope not in your control. When a character uses Last Breath and rolls a 7-9, you may offer them your 'gift' of transformation to a Lycanthrope as though you were death itself.
o Wild Scent: In animal form you can use the Ranger move Hunt and Track using your keen sense of smell. If your animal form is a giant lizard, snake or spider, you get this move instead of Wild Scent:
o Poison Bite: Choose a Touch poison. Once per day when you are in animal form you can inflict that poison on someone you successfully bite.
When you find out how you can be cured chose a method:
o Wolfsbane, picked and prepared under a strict recipe
o An exorcism, in a certain place using words from an ancient tomb
o Killing the creature that caused it
o Agonizingly cutting out the animal parts
o Ritualistic piercing with iron nails
o It can’t be cured, only endured as long as you can.
How did you become a lycanthrope?
o The child of a lycanthrope
o The curse of a witch
o Wounded by a lycanthrope
o Drinking from the footprint of an animal
o Sleeping with the full moon on your face
o The bite of a Worg or other animal.
Lycanthropes often have a few “tells” which stay with them in all their forms. Choose one or more:
o Animal footprints
o Animal shadow
o Cat eyes
o Fur inside your flesh
o Hairy arms
o Monobrow
o Prominent birthmark
o Prominent scar
o Scaled arms
o Slurred speech
o Stooped posture.
Compendium Class: Greater Lycanthrope
If you are a Lycanthrope and you successfully use The Moon Gift to transform a comrade, family member or innocent to a Lycanthrope, you may take this move when you level up.
o Lycanthropic Regeneration: When you are in animal form but not affected by any banes: heal 2 HP whenever you roll a 10+ on any move; and instead of making a Last Breath move after a short rest restore your HP to 1d6.
Once you’ve taken “Lycanthropic Regeneration,” the following moves count as class moves for you. In addition to your normal list of moves, you may choose from this list when you level up.
o Additional Form: You gain an additional animal form you can change. This form can include swarms of rats, snakes or spiders that can move through small holes but act as a single creature.
o The Embrace: When use the Moon Gift on an NPC, roll+CHA. On a 10+ they return as a faithful Lycanthrope and serve you. On 7-9 they return, but they only owe you three tasks. On a miss the GM can choose whether they will return or not, but if they do they will try to destroy you.
o Forceful Will: You gain more control over your changes. Remove one bane.
o Hybid: You can change into a hybrid form which combines the best of both normal and animal forms. In hybrid form you can use all animal moves (including Lycanthropic Regeneration) and also have hands and access to your possessions.
o Monkey's Tail: To take this move you must have a tail in your animal form. When in animal form your tail acts like an extra hand including to use a weapon or shield.
o Run with the Pack: If you are not a Ranger, gain an Animal Companion of the same type as your animal form as per the Ranger move.