Because of this, intrepid subterranean adventurers often find obsidian spiders in long-forgotten places where many other creatures would fear to tread.Getting Started with Obsidian for D&D ✨ Dec 20, 2021Īfter years of searching, I've found my favorite way to manage my notes and worldbuilding for Dungeons & Dragons campaigns. Unlike other species of delving creatures who might stumble upon forgotten ruins or lost arcane powers, the obsidian spider is able to withstand most magical traps or long-lasting effects. Obsidian spiders make their nests in deep caverns and forgotten places. This makes targeting obsidian spiders with spells wildly unpredictable at best, dangerous and suicidal at worst. The obsidian spider can sometimes use the magical power coursing through its exoskeleton to lash out at an unsuspecting enemy. When magical power hits the spider, it may be channeled into the surrounding rock, or recirculated through its exoskeleton’s conductive surface.Įquivalent Exchange. The protective property of the obsidian spider’s exoskeleton can channel magical effects away from the rest of the spider. Any spell that would severely harm or even kill another creature can be reduced by the innate restrictive power of the obsidian spider’s shell. Although most common on the Material Plane, obsidian spiders are found on the Plane of Lava and volcanic areas of other planes. These small spiders live their lives among the black sands and rocks of mountainous regions and volcanic beaches. These accidental populations have grown over time and spread elsewhere. Stray lightning bolts, odd wild effects, and the machinations of mad wizards have all led to the birth of obsidian spiders. When magical or other energies interact with volcanic rock, it can give rise to these creatures. This substance grounds the obsidian spider against magical effects and can reflect most low-level magics, making spellcasters’ attacks backfire. Heavily camouflaged by their rocky habitats, these tiny spiders’ exoskeletons are made of a dark and glossy chitin. Their primary prey are the typical insects that most spiders target, though they are frequently able to take down much larger prey when working as a swarm. Their nests are always underground, but often exceptionally deep below the surface. Obsidian spiders are territorial and, unusually for arachnids, highly sociable. On a failed save, the target takes 13 (3d8) damage of the same type as the spell that hit the spider, or half as much damage on a successful one. The caster must make a DC 12 Dexterity saving throw. When the spider takes damage from a spell, it can reflect some of the spell’s energy back at the spell’s caster if the spider is within 30 feet of the caster. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. The grounding properties of the spider’s glassy exoskeleton give the creature resistance to spells and magical effects. While the spider remains motionless, it is indistinguishable from a pebble or small rock. Each creature in a 10-foot-radius sphere centered on the spider must succeed on a DC 12 Dexterity save or take 14 (4d6) piercing damage from razor-sharp shrapnel. When the spider is reduced to 0 hit points, it explodes. Senses darkvision 60 ft., passive Perception 14
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