Requirements

Alignment: Any evil

Base Save Bonus: Fortitude +4.

Spells: Able to cast Spider Climb, Summon Swarm, and Web as arcane spells.

Special: The candidate must undergo a scarification ritual. To demonstrate his seriousness and devotion to the study of arachnemancy, a candidate for this prestige class must undergo a scarification ritual that involves searing his flesh with brands and rubbing dark ash or other pigmentation into the wound to create a raised, dark scar. The end result of this rite is a face well marked with a spider insignia.

Summary

This class is not for the faint of heart who hate spiders. This class weaponizes vermin and their abilities for your own usage, you get the ability to shape yourself into spiders, much like a Druid wild shapes into various other animals. You also gain the ability to envenomate your foes with a toxic touch and at the highest levels gain several abilities that spider has in addition to one of the most revolting abilities, to shoot a blast of normal sized spiders at people and make walls of sticky webs to keep people entrapped and deep within your web.

Role: Spell Utility

Characteristics: Arachnid focused casters, gaining poison touch and the ability to shape into spiders

Source: Underdark

Game Rule Information

The Arachnomancer has the following game statistics.

Abilities: Whatever your casting stat is, Charisma for dealing with vermin with your abilities, and dexterity for evading those who wish to stop your profane studies.

Alignment: Any Evil

Hit Die: d6

Starting Gold: N/A

Class Skills

The Arachnomancer's class skills are Climb (Str), Concentration (Con), Craft (any)(Int), Hide (Dex), Jump (Str), Knowledge (Underdark local)(Int), Knowledge (arcana)(Int), Knowledge (nature)(Int), Listen (Wis), Move Silently (Dex), Search (Int), Spellcraft (Int), and Spot (Wis).

Skill Points at 1st Level: (4 + Int modifier) × 4

Skill Points at Each Additional Level: 4 + Int modifier

Class Features

All of the following are class features of the Arachnomancer.

Weapon and Armor Proficiency: A Arachnomancer is proficient with whatever they were already proficient with prior to taking levels in this class.

Spells per Day/Spells Known: At 1st, 3rd, 4th, 6th, 7th, 9th, and 10th level, an arachnomancer gains new spells per day (and spells known, if applicable) as if he had also gained a level in a spellcasting class to which he belonged before adding the prestige class. He does not, however, gain any other benefit a character of that class would have gained (improved chance of turning or rebuking undead, metamagic or item creation feats, or the like). If the character had more than one spellcasting class before becoming an arachnomancer, the player must decide to which class to add each arachnomancer level for the purpose of determining spells per day, spells known, and overall caster level.

Poison Save Bonus: An arachnomancer adds his class level to all saves against poison.

Speak with SpidersSu: The arachnomancer can communicate with any spiderkind creature (see sidebar) as a free action. Mindless creatures can communicate and understand only extremely simple concepts (one word at best), but they generally don't try to eat someone who communicates with them.

Spider Magic: Add the following spells to the character's spell list (or to each spell list, if he has more than one): 0— Stick 1st— summon Small monstrous spider 1 ; 2nd— Spiderskin, summon Medium monstrous spider 1 ; 3rd— Neutralize Poison, Poison, summon Large monstrous spider 1 ; 4th— Giant Vermin (spiders only), Repel Vermin, summon Huge monstrous spider 1 ; 5th— spider plague 2 ; 6th— summon Gargantuan monstrous spider 1 ; 7th— Spider Shapes 3 ; 8th— summon Colossal monstrous spider 1 ; 9th— Shapechange (into spider or spiderkind creature only)

1 As Summon Monster, except that the spell summons one monstrous spider of the indicated size, 1d3 monstrous spiders one size category smaller, or 1d4+1 monstrous spiders two size categories smaller.

2 As Insect Plague, but summons spider swarms instead of locust swarms.

3 As Animal Shapes, but allows transformation into monstrous spider form only.

Spider magic spells are added to the character's class lists of available spells, so that he may choose them whenever he has the opportunity to acquire new spells of the appropriate level. He does not automatically learn them (in the case of a spellcaster who keeps spellbooks) or know them (in the case of a spellcaster who does not keep spellbooks).

SpiderformSu: Beginning at 2nd level, an arachnomancer may transform himself into a Small, Medium, or Large monstrous spider three times per day. At 5th level, he can also take the form of a Tiny or Huge monstrous spider, and at 8th level, he can take the form of a Gargantuan monstrous spider. This ability functions like polymorph, except that the indicated forms are the only ones available and the duration of the change is up to 10 minutes per arachnomancer level. Resuming normal form requires a standard action but does not provoke an attack of opportunity.

Venom TouchEx: The arachnomancer can secrete poison as a free action. When he first gains this ability at 3rd level, his touch deals 1d4 points of Strength damage. The damage increases to 1d6 points at 6th level and to 1d8 points at 9th level. In each case, a successful Fortitude save (DC 10 + arachnomancer level + arachnomancer's Con modifier) halves the damage, to a minimum of 1 point. The arachnomancer's poison cannot be harvested or saved for any purpose.

Command SpidersSu: At 4th level, an arachnomancer gains the ability to compel any spider or spiderkind creature in the same way that an evil cleric can rebuke or command undead. The arachnomancer can attempt to command spiders a number of times per day equal to 3 + his Charisma modifier. He is treated as a cleric of a level equal to his character level (not arachnomancer level) for the purpose of turning checks and turning damage.

WebwalkingSu: Beginning at 5th level, an arachnomancer can ignore webs (magical or nonmagical) as if affected by a freedom of movement spell. He can climb webs at his normal land speed without needing to make a Climb check and walk along webs without needing to make a Balance check.

Wall of WebsSp: At 7th level, an arachnomancer gains the ability to create a wall-like barrier of webs once per day. Unlike the webs produced by the Web spell, those in the wall of webs are resistant to fire and as tough as steel. A wall of webs functions like the Wall of Iron spell (caster level equals arachnomancer level), except that an arachnomancer can use his webwalking ability to move through the wall unhindered, and any other creature can use Freedom of Movement to do the same.

Spider BlastSp: Once per day, a 10th-level arachnomancer can produce a 50-footlong, cone-shaped blast of extremely poisonous, normal sized spiders. Every creature within the area of the blast takes 5d4 points of damage and must make 1d4 Fortitude saves against poison (DC 10 + arachnomancer level + arachnomancer's Con modifier; 1d6 points of Strength damage for both initial and secondary damage). Each creature is also allowed a Reflex save at the same DC for partial effect: Success means the victim takes half damage and need make only one Fortitude saving throw against poison (though the second saving throw normally required against a poison's secondary effect still applies). The spiders fade away at the end of the arachnomancer's turn.

Table 1-1: Arachnomancer Progression

Level	Base Attack Bonus	Fort Save	Ref Save	Will Save	Special	Spells per Day
1st	+0	+0	+2	+0	Poison save bonus, speak with spiders, spider magic	+1 level of existing spellcasting class
2nd	+1	+0	+3	+0	Spiderform (S, M, L)	—
3rd	+2	+1	+3	+1	Poison touch (1d4 Str)	+1 level of existing spellcasting class
4th	+3	+1	+4	+1	Command spiders	+1 level of existing spellcasting class
5th	+3	+1	+4	+1	Spiderform (T, H), webwalking	—
6th	+4	+2	+5	+2	Poison touch (1d6 Str)	+1 level of existing spellcasting class
7th	+5	+2	+5	+2	Wall of webs 1/day	+1 level of existing spellcasting class
8th	+6	+2	+6	+2	Spiderform (G)	—
9th	+6	+3	+6	+3	Poison touch (1d8 Str)	+1 level of existing spellcasting class
10th	+7	+3	+7	+3	Spider blast	+1 level of existing spellcasting class

Spiderkind

The term spiderkind includes all of the following creatures in the D&D® game.

City of the Spider Queen: Arachnoid creature, drider vampire, wraith spider.

Fiend Folio: Chwidencha.

Monster Manual: Aranea, bebilith (demon), drider, ettercap, phase spider, monstrous spider, retriever (demon), spider swarm.

Monster Manual II: Neogi, shadow spider, spellgaunt.

Monsters of Faerûn: Chitine, choldrith, myrolochar, subterranean (hairy and sword) spiders, yochlol (demon).

Adaptation

To the drow of Eberron, spiders and their kind are sacred but ultimately just reflections of the scorpion, a creature blessed by their strange deity Vulkoor. Arachnomancers hold a place in society similar to that of driders: They are seen as chosen servants of the Mockery, of whom it’s believed Vulkoor is a part.

With a little work, you can adapt this class so that it reflects the traits of scorpions rather than spiders. R Finally, instead of transforming into a spider, the arachnomancer changes into a similarly sized monstrous scorpion.