I've been looking for an excuse to share some work. I've been rolling with a few custom interactions since March, and have been updating them to 40.x for about a week now. This is the only one I have that I feel is ready at the moment.
I wanted an actual werewolf to hunt instead of a naked guy that sometimes turns into a rabid squirrel, so I made a megabeast to fill the niche. I took it a step further by putting a werecurse interaction into its bite. Then I took that a step further by giving the victim the ability to transform at will.
It works perfectly, both the the megabeast its surviving victims behave like normal werebeasts, transforming with the lunar cycle as normal and changing when threatened as well. The ability to transform at will makes all the difference, capable of turning the tide of battle in a heartbeat. You can't get an easy kill on one, even if you attack one when it's not that time of the month, it will just transform to defend itself.
The were-megabeast itself is no pushover either. Almost twice the size of a minotaur, it's more than capable of knocking you down and making sure you never get back up. Even large groups of enemies such as bandit camps pose little threat to one when controlled by a player. What's more, they're capable of wielding weapons, and you can continue to use yours while transformed.
[CREATURE:WULVER]
[DESCRIPTION:A gigantic humanoid monster twisted into lupine form. Its eyes glow yellow.]
[NAME:wulver:wulvers:lycanthropic]
[CASTE_NAME:wulver:wulvers:lycanthropic]
[CREATURE_TILE:'W'][ALTTILE:165][COLOR:4:0:0]
[GLOWTILE:'"'][GLOWCOLOR:6:0:1]
[NIGHT_CREATURE_HUNTER]
[DIFFICULTY:5]
[SEMIMEGABEAST][ATTACK_TRIGGER:50:5000:50000]
[CAN_LEARN][UTTERANCES]
[LIKES_FIGHTING][NOFEAR]
[CARNIVORE][BONECARN][NO_CONNECTIONS_FOR_MOVEMENT][NOEXERT]
[CANOPENDOORS]
[CRAZED]
[BUILDINGDESTROYER:1]
[PREFSTRING:big teeth]
[BIOME:ANY_TEMPERATE_FOREST]
[SPHERE:HUNTING]
[SPHERE:DEFORMITY]
[SPHERE:MOON]
[BODY:HUMANOID_NECK:2EYES:2EARS:NOSE:2LUNGS:HEART:GUTS:ORGANS:HUMANOID_JOINTS:THROAT:NECK:SPINE:BRAIN:SKULL:5FINGERS:5TOES:MOUTH:TONGUE:EYELIDS:GENERIC_TEETH_WITH_LARGE_EYE_TEETH:RIBCAGE]
[BODYGLOSS:PAW]
[BODY_DETAIL_PLAN:STANDARD_MATERIALS]
[BODY_DETAIL_PLAN:STANDARD_TISSUES]
[SELECT_TISSUE:HAIR]
[INSULATION:200]
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:SKIN:FAT:MUSCLE:BONE:CARTILAGE]
[BODY_DETAIL_PLAN:BODY_HAIR_TISSUE_LAYERS:HAIR]
[USE_MATERIAL_TEMPLATE:NAIL:NAIL_TEMPLATE]
[USE_TISSUE_TEMPLATE:NAIL:NAIL_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:FINGER:NAIL:FRONT]
[TISSUE_LAYER:BY_CATEGORY:TOE:NAIL:FRONT]
[SELECT_TISSUE_LAYER:HEART:BY_CATEGORY:HEART]
[PLUS_TISSUE_LAYER:SKIN:BY_CATEGORY:THROAT]
[TL_MAJOR_ARTERIES]
[BODY_DETAIL_PLAN:FACIAL_HAIR_TISSUES]
[BODY_DETAIL_PLAN:STANDARD_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RIBCAGE_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RELSIZES]
[USE_MATERIAL_TEMPLATE:SINEW:SINEW_TEMPLATE]
[TENDONS:LOCAL_CREATURE_MAT:SINEW:200]
[LIGAMENTS:LOCAL_CREATURE_MAT:SINEW:200]
[HAS_NERVES]
[USE_MATERIAL_TEMPLATE:BLOOD:BLOOD_TEMPLATE]
[BLOOD:LOCAL_CREATURE_MAT:BLOOD:LIQUID]
[CREATURE_CLASS:GENERAL_POISON]
[GETS_WOUND_INFECTIONS]
[GETS_INFECTIONS_FROM_ROT]
[USE_MATERIAL_TEMPLATE:PUS:PUS_TEMPLATE]
[PUS:LOCAL_CREATURE_MAT:PUS:LIQUID]
[USE_MATERIAL_TEMPLATE:TEARS:TEARS_TEMPLATE]
[SECRETION:LOCAL_CREATURE_MAT:TEARS:LIQUID:BY_CATEGORY:EYE:ALL:EXTREME_EMOTION]
[BODY_SIZE:0:0:400000]
[BODY_APPEARANCE_MODIFIER:HEIGHT:75:95:98:100:102:105:125]
[APP_MOD_IMPORTANCE:500]
[BODY_APPEARANCE_MODIFIER:BROADNESS:75:95:98:100:102:105:125]
[APP_MOD_IMPORTANCE:500]
[ATTACK:PUNCH:BODYPART:BY_TYPE:GRASP]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:punch:punches]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PREPARE_AND_RECOVER:3:3]
[ATTACK_FLAG_WITH]
[ATTACK_PRIORITY:MAIN]
[ATTACK:KICK:BODYPART:BY_TYPE:STANCE]
[ATTACK_SKILL:STANCE_STRIKE]
[ATTACK_VERB:kick:kicks]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PREPARE_AND_RECOVER:4:4]
[ATTACK_FLAG_WITH]
[ATTACK_PRIORITY:SECOND]
[ATTACK_FLAG_BAD_MULTIATTACK]
[ATTACK:SCRATCH:CHILD_TISSUE_LAYER_GROUP:BY_TYPE:GRASP:BY_CATEGORY:FINGER:NAIL]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:scratch:scratches]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PENETRATION_PERC:100]
[ATTACK_FLAG_EDGE]
[ATTACK_PREPARE_AND_RECOVER:3:3]
[ATTACK_PRIORITY:SECOND]
[ATTACK:BITE:CHILD_BODYPART_GROUP:BY_CATEGORY:HEAD:BY_CATEGORY:TOOTH]
[ATTACK_SKILL:BITE]
[ATTACK_VERB:bite:bites]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PENETRATION_PERC:100]
[ATTACK_FLAG_EDGE]
[ATTACK_PREPARE_AND_RECOVER:3:3]
[ATTACK_PRIORITY:SECOND]
[ATTACK_FLAG_CANLATCH]
[SPECIALATTACK_INTERACTION:LYCANTHROPY_1]
[EQUIPS]
[NATURAL_SKILL:WRESTLING:6]
[NATURAL_SKILL:BITE:8]
[NATURAL_SKILL:GRASP_STRIKE:6]
[NATURAL_SKILL:STANCE_STRIKE:6]
[NATURAL_SKILL:MELEE_COMBAT:8]
[NATURAL_SKILL:DODGING:6]
[NATURAL_SKILL:SITUATIONAL_AWARENESS:12]
[CHILD:1]
[EQUIPS]
[NOCTURNAL]
[SMELL_TRIGGER:5]
[HOMEOTHERM:10067]
[APPLY_CREATURE_VARIATION:STANDARD_BIPED_GAITS:900:447:298:149:1900:2900] 59 kph
[APPLY_CREATURE_VARIATION:STANDARD_CLIMBING_GAITS:3512:2634:1756:878:4900:6900] 10 kph
[APPLY_CREATURE_VARIATION:STANDARD_SWIMMING_GAITS:4732:4026:3327:1097:5922:7567] 8 kph
[APPLY_CREATURE_VARIATION:STANDARD_CRAWLING_GAITS:2990:2257:1525:731:4300:6100] 12 kph, NO DATA
[SWIMS_LEARNED]
[PHYS_ATT_RANGE:STRENGTH:1000:1100:1150:1250:1350:1550:2250]
[PHYS_ATT_RANGE:TOUGHNESS:1000:1100:1150:1250:1350:1550:2250]
[PHYS_ATT_RANGE:AGILITY:1000:1500:2250:2500:2750:3000:3500]
[PHYS_ATT_RANGE:ENDURANCE:1000:1100:1150:1250:1350:1550:2250]
[PHYS_ATT_RANGE:RECUPERATION:1000:1100:1150:1250:1350:1550:2250]
[PHYS_ATT_RANGE:DISEASE_RESISTANCE:1000:1100:1150:1250:1350:1550:2250]
[MENT_ATT_RANGE:FOCUS:1000:1100:1150:1250:1350:1550:2250]
[MENT_ATT_RANGE:WILLPOWER:1000:1500:2250:2500:2750:3000:3500]
[MENT_ATT_RANGE:MEMORY:1000:1100:1150:1250:1350:1550:2250]
[MENT_ATT_RANGE:SPATIAL_SENSE:2000:2100:2150:2250:2350:2550:3250]
[MENT_ATT_RANGE:KINESTHETIC_SENSE:1000:1500:2250:2500:2750:3000:3500]
[FANCIFUL]
[LAIR:WILDERNESS_LOCATION:100]
[LAIR_HUNTER]
[SET_TL_GROUP:BY_CATEGORY:ALL:HAIR]
[TL_COLOR_MODIFIER:BROWN:1:RED:1:CRIMSON:1:BLACK:1:WHITE:1:GRAY:1:SILVER:1]
[TLCM_NOUN:hair:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:ALL:SKIN]
[TL_COLOR_MODIFIER:BROWN:1:BURNT_UMBER:1:CINNAMON:1:COPPER:1:DARK_BROWN:1:DARK_PEACH:1:DARK_TAN:1:ECRU:1:PALE_BROWN:1:PALE_CHESTNUT:1:PALE_PINK:1:PEACH:1:PINK:1:RAW_UMBER:1:SEPIA:1:TAN:1:TAUPE_PALE:1:TAUPE_SANDY:1]
[TLCM_NOUN:skin:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:EYE:EYE]
[TL_COLOR_MODIFIER:YELLOW:1]
[TLCM_NOUN:eyes:PLURAL]
[INTERACTION:LYCANTHROPY_1]
[I_SOURCE:DEITY]
[IS_USAGE_HINT:MAJOR_CURSE]
[IS_HIST_STRING_1: cursed ]
[IS_HIST_STRING_2: to harbor a savage beast within]
[I_SOURCE:ATTACK]
[IS_HIST_STRING_1: bit ]
[IS_HIST_STRING_2:, passing on the lupine curse]
[I_TARGET:A:CREATURE]
[IT_LOCATION:CONTEXT_CREATURE]
[IT_REQUIRES:CAN_LEARN]
[IT_REQUIRES:HAS_BLOOD]
[IT_FORBIDDEN:NOT_LIVING]
[IT_FORBIDDEN:SUPERNATURAL]
[IT_IMMUNE_CLASS:OUTSIDER]
[IT_CANNOT_HAVE_SYNDROME_CLASS:WERECURSE]
[IT_CANNOT_HAVE_SYNDROME_CLASS:VAMPCURSE]
[IT_CANNOT_HAVE_SYNDROME_CLASS:DISTURBANCE_CURSE]
[I_EFFECT:ADD_SYNDROME]
[IE_TARGET:A]
[IE_IMMEDIATE]
[SYNDROME]
[SYN_CLASS:WERECURSE]
[CE_BODY_TRANSFORMATION:START:16800]
[CE:CREATURE:LYCANTHROPE:DEFAULT]
[CE:PERIODIC:MOON_PHASE:27:0]
[CE_ADD_TAG:PARALYZEIMMUNE:NO_AGING:START:0]
[CE_MATERIAL_FORCE_MULTIPLIER:MAT_MULT:INORGANIC:SILVER:3:1]
[CE_FEVER:SEV:100:PROB:400:START:1000:PEAK:1500:END:4000]
[CE_NAUSEA:SEV:100:PROB:200:START:1000:PEAK:1500:END:3000]
[CE_DIZZINESS:SEV:100:PROB:200:START:1000:PEAK:1500:END:2000]
[CE_PAIN:SEV:10000:PROB:100:START:4000:PEAK:4500:END:5500]
[CE_BODY_TRANSFORMATION:PROB:100:START:5000:END:10000]
[CE:CREATURE:WULVER:DEFAULT]
The ability to transform at will comes later so the victim can't turn immediately after getting bit and defend themselves in that way. Consider this ability a reward for surviving the encounter even after the werewolf got its jaws around you. This is better than a permanent transformation because you'll be able to regenerate by letting the timer run out and changing back.
[CE_CAN_DO_INTERACTION:START:20000]
[CDI:ADV_NAME:Beast Form]
[CDI:USAGE_HINT:FLEEING]
[CDI:VERB:unleash the beast:begins to shudder and contort:NA]
[CDI:TARGET:A:SELF_ONLY]
[CDI:TARGET_RANGE:A:1]
[CDI:MAX_TARGET_NUMBER:A:1]
[CDI:WAIT_PERIOD:5000]
[CDI:INTERACTION:WOLFMODE]
[INTERACTION:WOLFMODE]
[I_TARGET:A:CREATURE]
[IT_LOCATION:CONTEXT_CREATURE]
[IT_MANUAL_INPUT:self]
[I_EFFECT:ADD_SYNDROME]
[IE_TARGET:A]
[IE_IMMEDIATE]
[SYNDROME]
[CE_BODY_TRANSFORMATION:PROB:100:START:0:END:10000]
[CE:CREATURE:WULVER:DEFAULT]
I've since expanded this curse into many variant forms, but the core principle has remained the same, and the original has a special place in my heart.
I might have more later. I'm only available for two days every two weeks, so don't hold your breath.
Edit: Oh, ArKFallen beat me to it. Mine is a little more basic than that one, it's focused less on the healing aspect of transformations and more on turning into a lycanthropic engine of destruction. I like the direction his took, being able to heal yourself like that is always a good thing.