Here's the new one:
[CREATURE:SPIDER_CAVE_TANK]
[DESCRIPTION:A large, fast-moving spider commonly domesticated by dwarves. It has strong skin and a painful bite.]
[NAME:tank spider:tank spiders:tank spider]
[CASTE_NAME:tank spider:tank spiders:tank spider]
[CREATURE_TILE:15][COLOR:7:0:0]
[SPEED:1000]
[HUNTS_VERMIN]
[NO_FEVERS]
[HAS_NERVES]
[PETVALUE:100]
[PET]
[PARALYZEIMMUNE]
[WEBIMMUNE]
[NO_SLEEP]
[LIKES_FIGHTING]
[CLUSTER_NUMBER:1:5]
[COMMON_DOMESTIC]
[TRAINABLE]
[PACK_ANIMAL]
[EXTRAVISION][NOEMOTION][NOFEAR][NO_EAT][NO_DRINK]
[POPULATION_NUMBER:3:50]
[GRASSTRAMPLE:0]
[PREFSTRING:toughness]
[FIXED_TEMP:10000]
[CAVE_ADAPT]
[USE_MATERIAL_TEMPLATE:CHITIN:CHITIN_TANK_TEMPLATE]
[BODY:SPIDER:2EYES:HEART:GUTS:BRAIN:MOUTH]
[BODY_DETAIL_PLAN:CHITIN_MATERIALS_TANKSPIDER]
[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]
[USE_MATERIAL_TEMPLATE:ICHOR:ICHOR_TEMPLATE]
[BLOOD:LOCAL_CREATURE_MAT:ICHOR:LIQUID]
[CREATURE_CLASS:GENERAL_POISON]
[USE_MATERIAL_TEMPLATE:PUS:PUS_TEMPLATE]
[PUS:LOCAL_CREATURE_MAT:PUS:LIQUID]
[BODY_SIZE:0:0:3500]
[BODY_SIZE:1:0:15000]
[BODY_SIZE:2:0:65000]
[BODY_APPEARANCE_MODIFIER:LENGTH:90:95:98:100:102:105:130]
[BODY_APPEARANCE_MODIFIER:HEIGHT:90:95:98:100:102:105:130]
[BODY_APPEARANCE_MODIFIER:BROADNESS:90:95:98:100:102:105:130]
[USE_MATERIAL_TEMPLATE:POISON:CREATURE_EXTRACT_TEMPLATE]
[STATE_NAME:ALL_SOLID:frozen tank spider venom]
[STATE_ADJ:ALL_SOLID:frozen tank spider venom]
[STATE_NAME:LIQUID:tank spider venom]
[STATE_ADJ:LIQUID:tank spider venom]
[STATE_NAME:GAS:boiling tank spider venom]
[STATE_ADJ:GAS:boiling tank spider venom]
[PREFIX:NONE]
[ENTERS_BLOOD]
[SYNDROME]
[SYN_NAME:tank spider bite]
[SYN_AFFECTED_CLASS:GENERAL_POISON]
[SYN_INJECTED]
[CE_PAIN:SEV:70:PROB:100:START:5:PEAK:10:END:20]
[ATTACK:STING:BODYPART:BY_CATEGORY:MOUTH]
[ATTACK_SKILL:BITE]
[ATTACK_VERB:bite:bites]
[ATTACK_CONTACT_PERC:25]
[ATTACK_FLAG_EDGE]
[ATTACK_PRIORITY:MAIN]
[SPECIALATTACK_INJECT_EXTRACT:LOCAL_CREATURE_MAT:POISON:LIQUID:100:100]
[ATTACK_FLAG_CANLATCH]
[ALL_ACTIVE]
[HOMEOTHERM:10040]
[CASTE:FEMALE]
[FEMALE]
[CASTE:MALE]
[MALE]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:ALL:CHITIN]
[TL_COLOR_MODIFIER:METALLIC:1]
[TLCM_NOUN:chitin:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:EYE:EYE]
[TL_COLOR_MODIFIER:RED:1]
[TLCM_NOUN:eyes:PLURAL]
[SELECT_MATERIAL:ALL]
[MULTIPLY_VALUE:2]
My problem is that they just refuse to die until you hurt their brains.