Spider Climb. The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Web Sense. While in contact with a web, the spider knows the exact location of any other creature in contact with the same web. Web Walker. The spider ignores movement restrictions caused by webbing. Volatile End. When the Torch Spider dies, there is a 50% chance of the Nitroglycerin sack being ruptured and exploding. Any creature within a 10 foot radius must make a DC 13 dexterity saving throw. On a failed save, nearby creatures will take 2d8 fire damage. On a successful save, they take half.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: (1d6 + 3) piercing damage, and the target must make a DC 11 Constitution saving throw, taking 2d8 fire damage on a failed save, or no damage on a successful one. If the fire damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way. Web (Recharge 5-6). Ranged Weapon Attack: +5 to hit, range 30/60 ft., one creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 12 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; hp 5; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage). Nitro Spit (recharge 5-6). Ranged Weapon Attack: +4 to hit, range 30/80 ft., one creature. Hit: Creature takes 1d10+2 fire damage. 50% chance target remains on fire. When on fire target takes 1d8 fire damage at the beginning of their turn until someone takes an action to douse the flame. Alternatively, target can make DC10 dexterity check to roll and put out the fire. Target ends such a turn in prone position.
The average torch spider is roughly six feet tall and 5 feet in diameter, with a glossy black exo-skeleton and a red abdomen. It's mandibles are roughly the size of a human man's arms, and it's legs (inspite of their impressive strength, are as thin as a sapling's branches, appearing almost invisible at a glance.
Tropical, caves.