I think I've created something hideous (again).
creature_nite
[OBJECT:CREATURE]
[CREATURE:NITEMARE]
[DESCRIPTION:A monstrous horse comprised of an abominable mix of flesh, metal and flame. Its mane, eyes and hooves are constantly ablaze.]
[NAME:nitemare:nitemares:nitemare]
[CASTE_NAME:nitemare:nitemares:nitemare]
[CREATURE_TILE:'U'][COLOR:0:0:1]
[PETVALUE:1000]
[PREFSTRING:flaming manes]
[PREFSTRING:terrifying strength]
[LARGE_ROAMING][LARGE_PREDATOR][LIKES_FIGHTING][BONECARN]
[NOPAIN][FIREIMMUNE][FIREIMMUNE_SUPER][MAGMA_VISION]
[NO_DIZZINESS][NO_FEVERS][NONAUSEA]
[POPULATION_NUMBER:5:10][FREQUENCY:33]
[CLUSTER_NUMBER:1:3][LOOSE_CLUSTERS]
[BIOME:GRASSLAND_TEMPERATE]
[BIOME:SAVANNA_TEMPERATE]
[BIOME:ANY_DESERT]
[EVIL][MEANDERER][PET]
[BODY:QUADRUPED_HOOF:TAIL:2EYES:2EARS:NOSE:2LUNGS:HEART:GUTS:ORGANS:THROAT:NECK:SPINE:BRAIN:SKULL:MOUTH:GENERIC_TEETH_WITH_LARGE_EYE_TEETH:RIBCAGE]
[BODY_DETAIL_PLAN:STANDARD_MATERIALS]
[USE_MATERIAL_TEMPLATE:HOOF:HOOF_TEMPLATE]
[BODY_DETAIL_PLAN:STANDARD_TISSUES]
[USE_TISSUE_TEMPLATE:HOOF:HOOF_TEMPLATE]
[USE_MATERIAL_TEMPLATE:FLAME:FLAME_TEMPLATE]
[USE_TISSUE_TEMPLATE:FLAME:FLAME_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:NECK:FLAME:TOP:BY_CATEGORY:SKIN]
[SELECT_MATERIAL:HOOF]
[STATE_COLOR:ALL_SOLID:ORANGE]
[DISPLAY_COLOR:4:0:1]
[FIXED_TEMP:14000]
[SELECT_MATERIAL:EYE]
[STATE_COLOR:ALL_SOLID:ORANGE]
[DISPLAY_COLOR:4:0:1]
[FIXED_TEMP:14000]
[TISSUE:IRON]
[TISSUE_NAME:iron:NP]
[TISSUE_MATERIAL:INORGANIC:IRON]
[THICKENS_ON_STRENGTH]
[ARTERIES]
[MUSCULAR]
[VASCULAR:5]
[RELATIVE_THICKNESS:3]
[HEALING_RATE:250]
[CONNECTS]
[TISSUE_SHAPE:LAYER]
[TISSUE:STEEL]
[TISSUE_NAME:steel:NP]
[TISSUE_MATERIAL:INORGANIC:STEEL]
[MUSCULAR]
[STRUCTURAL]
[VASCULAR:3]
[RELATIVE_THICKNESS:2]
[HEALING_RATE:250]
[CONNECTS]
[TISSUE_SHAPE:LAYER]
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:SKIN:FAT:IRON:STEEL:CARTILAGE]
[BODY_DETAIL_PLAN:BODY_HAIR_TISSUE_LAYERS:HAIR]
[SELECT_TISSUE_LAYER:HEART:BY_CATEGORY:HEART]
[PLUS_TISSUE_LAYER:SKIN:BY_CATEGORY:THROAT]
[TL_MAJOR_ARTERIES]
[BODY_DETAIL_PLAN:STANDARD_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RIBCAGE_POSITIONS]
[USE_MATERIAL_TEMPLATE:SINEW:SINEW_TEMPLATE]
[SELECT_MATERIAL:SINEW]
[STATE_COLOR:ALL_SOLID:GRAY]
[STATE_NAME:ALL_SOLID:biometallic sinew]
[STATE_ADJ:ALL_SOLID:biometallic sinew]
[IMPACT_YIELD:542500]
[IMPACT_FRACTURE:1085000]
[IMPACT_STRAIN_AT_YIELD:319]
[COMPRESSIVE_YIELD:542500]
[COMPRESSIVE_FRACTURE:1085000]
[COMPRESSIVE_STRAIN_AT_YIELD:319]
[TENSILE_YIELD:155000]
[TENSILE_FRACTURE:310000]
[TENSILE_STRAIN_AT_YIELD:73]
[TORSION_YIELD:155000]
[TORSION_FRACTURE:310000]
[TORSION_STRAIN_AT_YIELD:189]
[SHEAR_YIELD:155000]
[SHEAR_FRACTURE:310000]
[SHEAR_STRAIN_AT_YIELD:189]
[BENDING_YIELD:155000]
[BENDING_FRACTURE:310000]
[BENDING_STRAIN_AT_YIELD:73]
[TENDONS:LOCAL_CREATURE_MAT:SINEW:100]
[LIGAMENTS:LOCAL_CREATURE_MAT:SINEW:100]
[SELECT_MATERIAL:ALL]
[HEATDAM_POINT:NONE]
[BLOOD:INORGANIC:IRON:LIQUID]
[BODY_SIZE:0:0:100000]
[BODY_SIZE:1:0:200000]
[BODY_SIZE:2:0:500000]
[BODY_SIZE:40:0:5000000]
[BODY_APPEARANCE_MODIFIER:LENGTH:90:95:98:100:102:105:110]
[BODY_APPEARANCE_MODIFIER:HEIGHT:90:95:98:100:102:105:110]
[BODY_APPEARANCE_MODIFIER:BROADNESS:90:95:98:100:102:105:110]
[ATTACK:KICK:BODYPART:BY_CATEGORY:HOOF_FRONT]
[ATTACK_SKILL:STANCE_STRIKE]
[ATTACK_VERB:kick:kicks]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PRIORITY:MAIN]
[ATTACK_FLAG_WITH]
[ATTACK:KICK:BODYPART:BY_CATEGORY:HOOF_REAR]
[ATTACK_SKILL:STANCE_STRIKE]
[ATTACK_VERB:kick:kicks]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PRIORITY:MAIN]
[ATTACK_FLAG_WITH]
[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_PRIORITY:MAIN]
[ATTACK_FLAG_CANLATCH]
[CHILD:1][GENERAL_CHILD_NAME:nitemare foal:nitemare foals]
[NOCTURNAL]
[HOMEOTHERM:10068]
[SWIMS_INNATE][SWIM_SPEED:2500]
[CASTE:FEMALE]
[FEMALE]
[MULTIPLE_LITTER_RARE]
[CASTE:MALE]
[MALE]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:ALL:HAIR]
[TL_COLOR_MODIFIER:BLACK:1]
[TLCM_NOUN:hair:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:ALL:FLAME]
[TL_COLOR_MODIFIER:ORANGE:1:RED:1:YELLOW:1]
[TLCM_NOUN:flames:PLURAL]
[SET_TL_GROUP:BY_CATEGORY:ALL:SKIN]
[TL_COLOR_MODIFIER:BLACK:1]
[TLCM_NOUN:skin:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:NECK:FLAME]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:1:1:1:1:1:1:1]
[APP_MOD_NOUN:mane:SINGULAR]
[APP_MOD_RATE:10:DAILY:0:100:0:0:NO_END]
No, it's not made out of adamantine or slade. It is, however, potentially huge, partially made of iron and steel, fanged, aggressive, immortal, and partially on fire (I tried to get the actual flame itself to surround the hooves and eyes, but it appears me and the more advanced layer tokens have a bad history, so I just had to settle for them being perma-ignited). Testing involved it boiling my blood as it stepped on it, and likewise me getting my leg broken, falling into a pool of its blood, and subsequently melting.
I think it's coming for me. Send help.