Code below:
[CREATURE:SPIDER_MAGMA_GIANT]
[DESCRIPTION:A large magma dwelling monster with eight legs and sharp, venomous fangs.]
[NAME:giant magma spider:giant magma spiders:giant magma spider]
[CASTE_NAME:giant magma spider:giant magma spiders:giant magma spider]
[CREATURE_TILE:'S'][COLOR:4:0:0]
[PETVALUE:2500][PET_EXOTIC]
[BIOME:SUBTERRANEAN_LAVA]
[UNDERGROUND_DEPTH:0:5]
[NOBREATHE][FIREIMMUNE][MAGMA_VISION]
[NO_SLEEP][NOPAIN][EXTRAVISION][NOSTUN][NOEMOTION][NOFEAR]
[THICKWEB][WEBIMMUNE][AMBUSHPREDATOR][PARALYZEIMMUNE]
[USE_MATERIAL_TEMPLATE:SILK:FIREPROOFSILK_TEMPLATE]
[WEBBER:LOCAL_CREATURE_MAT:SILK]
[CAN_DO_INTERACTION:MATERIAL_EMISSION]
[CDI:ADV_NAME:Spray web]
[CDI:USAGE_HINT:ATTACK]
[CDI:BP_REQUIRED:BY_TOKEN:LB]
[CDI:MATERIAL:LOCAL_CREATURE_MAT:SILK:WEB_SPRAY]
[CDI:TARGET:C:LINE_OF_SIGHT]
[CDI:TARGET_RANGE:C:5]
[CDI:MAX_TARGET_NUMBER:C:1]
[CDI:WAIT_PERIOD:30]
[LARGE_ROAMING][FREQUENCY:20][DIFFICULTY:3]
[POPULATION_NUMBER:3:4]
[CARNIVORE][NATURAL]
[BUILDINGDESTROYER:1]
[LARGE_PREDATOR]
[SAVAGE]
[GRASSTRAMPLE:10]
[PREFSTRING:mystery]
[NOBONES]
[BODY:SPIDER:2EYES:HEART:GUTS:BRAIN:MOUTH]
[BODY_DETAIL_PLAN:CHITIN_MATERIALS]
[BODY_DETAIL_PLAN:CHITIN_TISSUES]
[BODY_DETAIL_PLAN:EXOSKELETON_TISSUE_LAYERS:CHITIN:FAT:MUSCLE]
[SELECT_TISSUE_LAYER:HEART:BY_CATEGORY:HEART]
[TL_MAJOR_ARTERIES]
[BODY_DETAIL_PLAN:STANDARD_HEAD_POSITIONS]
[USE_MATERIAL_TEMPLATE:SINEW:SINEW_TEMPLATE]
[TENDONS:LOCAL_CREATURE_MAT:SINEW:200]
[LIGAMENTS:LOCAL_CREATURE_MAT:SINEW:200]
[HAS_NERVES]
[USE_MATERIAL_TEMPLATE:ICHOR:ICHOR_TEMPLATE]
[BLOOD:LOCAL_CREATURE_MAT:ICHOR:LIQUID]
[CREATURE_CLASS:GENERAL_POISON]
[GETS_WOUND_INFECTIONS]
[GETS_INFECTIONS_FROM_ROT]
[USE_MATERIAL_TEMPLATE:PUS:PUS_TEMPLATE]
[PUS:LOCAL_CREATURE_MAT:PUS:LIQUID]
[BODY_SIZE:0:0:20000]
[BODY_SIZE:1:0:100000]
[BODY_SIZE:2:0:200000]
[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]
[MAXAGE:20:30]
[USE_MATERIAL_TEMPLATE:POISON:CREATURE_EXTRACT_TEMPLATE]
[STATE_NAME:ALL_SOLID:frozen giant magma spider venom]
[STATE_ADJ:ALL_SOLID:frozen giant magma spider venom]
[STATE_NAME:LIQUID:giant magma spider venom]
[STATE_ADJ:LIQUID:giant magma spider venom]
[STATE_NAME:GAS:boiling giant magma spider venom]
[STATE_ADJ:GAS:boiling giant magma spider venom]
[PREFIX:NONE]
[ENTERS_BLOOD]
[SYNDROME]
[SYN_NAME:giant magma spider bite]
[SYN_AFFECTED_CLASS:GENERAL_POISON]
[SYN_IMMUNE_CREATURE:SPIDER_FOREST:ALL]
[SYN_INJECTED]
[CE_PARALYSIS:SEV:100:PROB:100:RESISTABLE:SIZE_DILUTES:START:5:PEAK:10:END:20]
[ATTACK:STING:BODYPART:BY_CATEGORY:MOUTH]
[ATTACK_SKILL:BITE]
[ATTACK_VERB:bite:bites]
[ATTACK_CONTACT_PERC:100]
[ATTACK_FLAG_EDGE]
[ATTACK_PRIORITY:MAIN]
[SPECIALATTACK_INJECT_EXTRACT:LOCAL_CREATURE_MAT:POISON:LIQUID:100:100]
[ATTACK_FLAG_CANLATCH]
[ALL_ACTIVE]
[HOMEOTHERM:10040]
[SWIMS_INNATE][SWIM_SPEED:2500]
[BABY:1]
[GENERAL_BABY_NAME:giant magma spider hatchling:giant magma spider hatchlings]
[BABYNAME:giant magma spider hatchling:giant magma spider hatchlings]
[CASTE:FEMALE]
[FEMALE]
[CASTE:MALE]
[MALE]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:ALL:CHITIN]
[TL_COLOR_MODIFIER:RED:1]
[TLCM_NOUN:chitin:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:EYE:EYE]
[TL_COLOR_MODIFIER:BLACK:1]
[TLCM_NOUN:eyes:PLURAL]
[SELECT_MATERIAL:ALL]
[MULTIPLY_VALUE:4]
[COLDDAM_POINT:NONE]
[HEATDAM_POINT:NONE]
[IGNITE_POINT:NONE]
[IF_EXISTS_SET_MELTING_POINT:15000]
[IF_EXISTS_SET_BOILING_POINT:20000]
[SELECT_MATERIAL:ICHOR]
[MELTING_POINT:10000]
material_template_extended
[OBJECT:MATERIAL_TEMPLATE]
[MATERIAL_TEMPLATE:FIREPROOFSILK_TEMPLATE]
[STATE_COLOR:ALL_SOLID:WHITE]
[STATE_NAME:ALL_SOLID:fireproof silk]
[STATE_ADJ:ALL_SOLID:fireproof silk]
[STATE_COLOR:LIQUID:WHITE]
[STATE_NAME:LIQUID:n/a]
[STATE_ADJ:LIQUID:n/a]
[STATE_COLOR:GAS:WHITE]
[STATE_NAME:GAS:n/a]
[STATE_ADJ:GAS:n/a]
[DISPLAY_COLOR:7:0:1]
[MATERIAL_VALUE:1]
[SPEC_HEAT:420]
[IGNITE_POINT:NONE]
[MELTING_POINT:25000]
[BOILING_POINT:50000]
[HEATDAM_POINT:NONE]
[COLDDAM_POINT:NONE]
[MAT_FIXED_TEMP:NONE]
[SOLID_DENSITY:500]
[LIQUID_DENSITY:NONE]
[MOLAR_MASS:NONE]
[IMPACT_YIELD:10000]
[IMPACT_FRACTURE:10000]
[IMPACT_STRAIN_AT_YIELD:100000]
[COMPRESSIVE_YIELD:10000]
[COMPRESSIVE_FRACTURE:10000]
[COMPRESSIVE_STRAIN_AT_YIELD:100000]
[TENSILE_YIELD:10000]
[TENSILE_FRACTURE:10000]
[TENSILE_STRAIN_AT_YIELD:100000]
[TORSION_YIELD:10000]
[TORSION_FRACTURE:10000]
[TORSION_STRAIN_AT_YIELD:100000]
[SHEAR_YIELD:1150000] used spider silk from wikipedia
[SHEAR_FRACTURE:1200000]
[SHEAR_STRAIN_AT_YIELD:100000]
[BENDING_YIELD:10000]
[BENDING_FRACTURE:10000]
[BENDING_STRAIN_AT_YIELD:100000]
[MAX_EDGE:0]
[ABSORPTION:100]
[SILK]
[ITEMS_SOFT]