I've got a suggestion for a horrifying beast to mod in to challenge players who brave the caverns:
Their last breath!
Creature_Ulolgasol
[OBJECT:CREATURE]
[CREATURE:LASTBREATH]
[DESCRIPTION:A creature dwarves fear beyond all others. A demon that stalks the mortal plane without bounds. The reason adamantine is so rare. Their last breath before they die; a scream on which the beast feasts.]
[NAME:last-breath:last-breaths:last-breath]
[CHILD:1][CHILDNAME:ulolgasol welp:ulolgasol welps]
[DIFFICULTY:5]
[CREATURE_TILE:'e'][COLOR:7:0:1]
[PETVALUE:50]
[BIOME:SUBTERRANEAN_CHASM]
[UNDERGROUND_DEPTH:2:3]
[LARGE_ROAMING][LARGE_PREDATOR]
[FREQUENCY:10]
[NOBREATHE][NOFEAR][EQUIPS]
[NOBONES]
[CLUSTER_NUMBER:40:100]
[POPULATION_NUMBER:100:500]
[PREFSTRING:many limbs]
[PREFSTRING:terrifying maw]
[GLOWTILE:9][GLOWCOLOR:4:0:1]
[CURIOUSBEAST_GUZZLER]
[CURIOUSBEAST_EATER]
[CURIOUSBEAST_ITEM]
[MAGMA_VISION]
[PRONE_TO_RAGE:25]
[BUILDINGDESTROYER:2]
[CASTE:LASTBREATH_FEM]
[CASTE_NAME:ulolgasol queen:ulolgasol queens:ulolgasol queen]
[FEMALE]
[DESCRIPTION:An enormous multi-limbed creature with a bloated body. It's children swarm around it, bringing it various organics which they slaughter.]
[BODY_SIZE:0:0:5000000]
[BODY_SIZE:1:0:20000000]
[POP_RATIO:1]
[LITTERSIZE:10:25]
[BODY:BASIC_1PARTBODY:BASIC_HEAD:4_WINGS_HORIZONTAL_ULB:4ARMS_STANCE:REAR_BODY_FLIPPERS:HEART:GUTS:2LUNGS:ORGANS:THROAT:BRAIN:SKULL:2FINGERS:4EYES:MOUTH:GENERIC_TEETH_WITH_FANGS]
[SPEED:1000]
[CAN_LEARN]
[SKILL_RATES:50:NONE:NONE:NONE]
[PHYS_ATT_RATES:TOUGHNESS:400:NONE:NONE:NONE]
[PHYS_ATT_RATES:ENDURANCE:400:NONE:NONE:NONE]
[PHYS_ATT_RATES:STRENGTH:400:NONE:NONE:NONE]
[PHYS_ATT_RATES:AGILITY:400:NONE:NONE:NONE]
[PHYS_ATT_CAP_PERC:TOUGHNESS:3500]
[PHYS_ATT_CAP_PERC:ENDURANCE:3500]
[PHYS_ATT_CAP_PERC:STRENGTH:3500]
[PHYS_ATT_CAP_PERC:AGILITY:3500]
[NATURAL_SKILL:WRESTLING:7]
[NATURAL_SKILL:BITE:7]
[NATURAL_SKILL:GRASP_STRIKE:7]
[NATURAL_SKILL:RANGED_COMBAT:9]
[NATURAL_SKILL:MELEE_COMBAT:7]
[SKILL_LEARN_RATE:DODGING:0]
[NATURAL_SKILL:SITUATIONAL_AWARENESS:10]
[CASTE:FEMALE]
[CASTE_NAME:ulolgasol warrior:ulolgasols warriors:ulolgasol warrior]
[FEMALE]
[DESCRIPTION:A large flying beast, black and leathery, it's four wings mirrored by four stubby, taloned legs, and equipped with a great toothy maw. This cast of females deal with anything that puts up resistance.]
[BODY_SIZE:0:0:30000]
[BODY_SIZE:1:0:100000]
[POP_RATIO:26]
[MULTIPLE_LITTER_RARE]
[BODY:BASIC_2PARTBODY:BASIC_HEAD:4_WINGS_HORIZONTAL_ULB:4ARMS_STANCE:HEART:GUTS:2LUNGS:ORGANS:THROAT:BRAIN:SKULL:2FINGERS:4EYES:MOUTH:2TUSKS:2HEAD_HORN_NUMBERED:GENERIC_TEETH_WITH_FANGS]
[SPEED:600]
[FLIER]
[CAN_LEARN]
[SKILL_RATES:35:NONE:NONE:NONE]
[PHYS_ATT_RATES:TOUGHNESS:600:NONE:NONE:NONE]
[PHYS_ATT_RATES:ENDURANCE:600:NONE:NONE:NONE]
[PHYS_ATT_RATES:STRENGTH:600:NONE:NONE:NONE]
[PHYS_ATT_RATES:AGILITY:600:NONE:NONE:NONE]
[PHYS_ATT_CAP_PERC:TOUGHNESS:2500]
[PHYS_ATT_CAP_PERC:ENDURANCE:2500]
[PHYS_ATT_CAP_PERC:STRENGTH:2500]
[PHYS_ATT_CAP_PERC:AGILITY:2500]
[NATURAL_SKILL:WRESTLING:6]
[NATURAL_SKILL:BITE:6]
[NATURAL_SKILL:GRASP_STRIKE:5]
[NATURAL_SKILL:GRASP_STRIKE:5]
[NATURAL_SKILL:RANGED_COMBAT:1]
[NATURAL_SKILL:MELEE_COMBAT:7]
[NATURAL_SKILL:DODGING:5]
[NATURAL_SKILL:SITUATIONAL_AWARENESS:4]
[CASTE:MALE]
[CASTE_NAME:ulolgasol drone:ulolgasol drones:ulolgasol drone]
[MALE]
[DESCRIPTION:A flying creature that serves it's queen by carrying food back to them. These males serve as scouts and breed with warriors and queens of different tribes.]
[BODY_SIZE:0:0:30000]
[BODY_SIZE:1:0:60000]
[POP_RATIO:23]
[BODY:BASIC_2PARTBODY:BASIC_HEAD:4_WINGS_HORIZONTAL_ULB:4ARMS_STANCE:HEART:GUTS:2LUNGS:ORGANS:BRAIN:THROAT:SKULL:2FINGERS:4EYES:MOUTH:GENERIC_TEETH_WITH_FANGS]
[SPEED:710]
[FLIER]
[CAN_LEARN]
[SKILL_RATES:35:NONE:NONE:NONE]
[PHYS_ATT_RATES:TOUGHNESS:400:NONE:NONE:NONE]
[PHYS_ATT_RATES:ENDURANCE:400:NONE:NONE:NONE]
[PHYS_ATT_RATES:STRENGTH:400:NONE:NONE:NONE]
[PHYS_ATT_RATES:AGILITY:400:NONE:NONE:NONE]
[PHYS_ATT_CAP_PERC:TOUGHNESS:1500]
[PHYS_ATT_CAP_PERC:ENDURANCE:1500]
[PHYS_ATT_CAP_PERC:STRENGTH:1500]
[PHYS_ATT_CAP_PERC:AGILITY:1500]
[NATURAL_SKILL:WRESTLING:4]
[NATURAL_SKILL:BITE:4]
[NATURAL_SKILL:GRASP_STRIKE:4]
[NATURAL_SKILL:RANGED_COMBAT:2]
[NATURAL_SKILL:MELEE_COMBAT:4]
[NATURAL_SKILL:DODGING:7]
[NATURAL_SKILL:SITUATIONAL_AWARENESS:12]
[SELECT_CASTE:ALL]
------- [USE_MATERIAL_TEMPLATE:VENOM:CREATURE_EXTRACT_TEMPLATE]
[STATE_NAME:ALL_SOLID:frozen last-breath venom]
[STATE_ADJ:ALL_SOLID:frozen last-breath venom]
[STATE_NAME:LIQUID:last-breath venom]
[STATE_ADJ:LIQUID:last-breath venom]
[STATE_NAME:GAS:boiling last-breath venom]
[STATE_ADJ:GAS:boiling last-breath venom]
[PREFIX:NONE]
[ENTERS_BLOOD]
------- [SYNDROME]
[SYN_NAME:Your Last Breaths]
[SYN_AFFECTED_CLASS:GENERAL_POISON]
[SYN_IMMUNE_CREATURE:LASTBREATH:ALL]
[SYN_INJECTED]
[SYN_CONTACT]
[SYN_INHALED]
[SYN_INGESTED]
[CE_PAIN:SEV:50:PROB:100:LOCALIZED:VASCULAR_ONLY:RESISTABLE:START:15:PEAK:600:END:1000]
[CE_FEVER:SEV:20:PROB:100:LOCALIZED:RESISTABLE:START:500:PEAK:150000:END:200000]
[CE_DIZZINESS:SEV:10:PROB:100:LOCALIZED:RESISTABLE:START:500:PEAK:150000:END:200000]
[CE_BLEEDING:SEV:100:PROB:100:VASCULAR_ONLY:LOCALIZED:START:500000:PEAK:500100:END:5000150]
[CE_NECROSIS:SEV:100:PROB:100:VASCULAR_ONLY:START:1000000:PEAK:1000300:END:1001000]
[NO_THOUGHT_CENTER_FOR_MOVEMENT]
[BODY_DETAIL_PLAN:STANDARD_MATERIALS]
[REMOVE_MATERIAL:HAIR]
[USE_MATERIAL_TEMPLATE:IVORY:TOOTH_TEMPLATE]
[STATE_NAME:ALL_SOLID:ivory]
[STATE_ADJ:ALL_SOLID:ivory]
[BODY_DETAIL_PLAN:STANDARD_TISSUES]
[REMOVE_TISSUE:HAIR]
[USE_TISSUE_TEMPLATE:IVORY:IVORY_TEMPLATE]
[TISSUE_NAME:ivory:NP]
[BODY_DETAIL_PLAN:EXOSKELETON_TISSUE_LAYERS:SKIN:FAT:MUSCLE]
[USE_MATERIAL_TEMPLATE:CLAW:NAIL_TEMPLATE]
[USE_TISSUE_TEMPLATE:CLAW:CLAW_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:FINGER:CLAW:FRONT]
[HAS_NERVES]
[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]
[ALL_ACTIVE]
[NO_SLEEP]
[HOMEOTHERM:10040]
[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]
[SPECIALATTACK_INJECT_EXTRACT:LOCAL_CREATURE_MAT:VENOM:LIQUID:100:200]
[ATTACK:SCRATCH:CHILD_TISSUE_LAYER_GROUP:BY_TYPE:GRASP:BY_CATEGORY:FINGER:CLAW]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:scratch:scratches]
[ATTACK_CONTACT_PERC:1]
[ATTACK_PENETRATION_PERC:100]
[ATTACK_FLAG_EDGE]
[ATTACK_PRIORITY:MAIN]
[SELECT_CASTE:FEMALE]
[ATTACK:TGORE:BODYPART:BY_CATEGORY:TUSK]
[ATTACK_SKILL:STANCE_STRIKE]
[ATTACK_VERB:gore:gores]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PENETRATION_PERC:100]
[ATTACK_PRIORITY:MAIN]
[ATTACK_FLAG_WITH]
[SELECT_CASTE:LASTBREATH_FEM]
[CAN_DO_INTERACTION:MATERIAL_EMISSION]
[CDI:ADV_NAME:Spit venom]
[CDI:USAGE_HINT:ATTACK]
[CDI:BP_REQUIRED:BY_CATEGORY:MOUTH]
[CDI:MATERIAL:LOCAL_CREATURE_MAT:VENOM:SPATTER_LIQUID]
[CDI:VERB:spit a glob of venom:spits a glob of venom:NA]
[CDI:TARGET:C:LINE_OF_SIGHT]
[CDI:TARGET_RANGE:C:35]
[CDI:MAX_TARGET_NUMBER:C:1]
[CDI:WAIT_PERIOD:100]
[CAN_DO_INTERACTION:MATERIAL_EMISSION]
[CDI:ADV_NAME:Spray venom]
[CDI:USAGE_HINT:ATTACK]
[CDI:BP_REQUIRED:BY_CATEGORY:MOUTH]
[CDI:MATERIAL:LOCAL_CREATURE_MAT:VENOM:TRAILING_VAPOR_FLOW]
[CDI:VERB:spray a stream of venom:sprays a stream of venom:NA]
[CDI:TARGET:C:LINE_OF_SIGHT]
[CDI:TARGET_RANGE:C:6]
[CDI:MAX_TARGET_NUMBER:C:1]
[CDI:WAIT_PERIOD:100]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:ALL:SKIN]
[TL_COLOR_MODIFIER:BLACK:1]
[TLCM_NOUN:dry, leathery skin:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:ALL:EYE]
[TL_COLOR_MODIFIER:IRIS_EYE_RED:1]
[TLCM_NOUN:eyes:PLURAL]
body_Ulolgasol
[OBJECT:BODY]
[BODY:4_WINGS_HORIZONTAL_ULB]
[BP:1RW:front right wing:STP][CONTYPE:UPPERBODY][LIMB][RIGHT][FLIER][CATEGORY:WING]
[DEFAULT_RELSIZE:30]
[BP:1LW:front left wing:STP][CONTYPE:UPPERBODY][LIMB][LEFT][FLIER][CATEGORY:WING]
[DEFAULT_RELSIZE:30]
[BP:2RW:hind right wing:STP][CONTYPE:LOWERBODY][LIMB][RIGHT][FLIER][CATEGORY:WING]
[DEFAULT_RELSIZE:30]
[BP:2LW:hind left wing:STP][CONTYPE:LOWERBODY][LIMB][LEFT][FLIER][CATEGORY:WING]
[DEFAULT_RELSIZE:30]
There's a little problem that I'm still trying to figure out:
If I maek their tissues fireproof, their venom doesn't poison things like I intended. It flash-fries them. Like, they literally melt. Before their next turn comes up. If they get bit, it's insta-death. If a queen sprays the venom on them, they catch on fire and burn to death a little more slowly... But the queen's gob-spitting attack doesn't even work, presumably because the gob vaporizes instantaneously.
HumanX has melted x50
So until I figure out why that is, they will have to be vulnerable to fire.