DERRO

Derroes are very much like humans, only shorter and slightly more muscular in proportion to their height. Their features tend towards grossness. Their hair is pale tan or yellow, their skin is very white with a bluish undertone, and their eyes are very large.

The derro are a degenerate race of dwarf-like stature, possibly a cross between Evil humans and dwarves. They inhabit the great subterranean realms common to drow and their ilk (kuo-toans, mind flayers, troglodytes, etc.). Although the derro hate light and suffer from nausea in sunlight, they venture out upon the surface of the earth at night through secret shaft openings to steal and kidnap humans for slaves. Rumor says that some humans are actually eaten as well. Derros have high Dexterity (15-18), so armor class must be adjusted accordingly.

The derroes are said to have a major stronghold somewhere deep beneath the ground, and there their savants plot and scheme to devastate the upper world and enslave all mankind.

Derroes have poor infravision (30-foot range) but good ultravision (120 feet).

Armor and weapons are as follows. 

For every 3 derroes encountered there will be 1 having 4 hit dice. For every 6 derroes encountered there will be 1 having 5 hit dice. If 10 or more are encountered, there will be a 7-hit dice leader and a 6-hit dice lieutenant. All of these higher level derroes are in addition to the initial number encountered. 

All higher level derroes wear scaled leather and use superior weapons. 

If 20 or more derroes are encountered, there will be a savant (detailed below) and 2 student savants as well.

A derro lair will always have 30 plus 3-12 additional normal derroes, a corresponding number of higher level leaders, 1-3 savants, 2-5 student savants, 15-40 slaves (80% female), and 1-3 gargoyles (70%; 01-70), or a lamia (30%, 71-00) as allies.

They speak a language of their own, some Common, and know the trade vernacular of the underground world.

Aklys, thrown. 1d4/1d4; ROF 1/1; Speed 3; Range 1"/-/-; Armor Rating Adj: 2: (+6), 3: (+5), 4: (+4), 5: (+3), 6: (+2), 7: (+1), 8: (+0), 9: (+0), 10: (+0); Weight 3.5-lbs. Control is through a 20-ft thong. 

When hit, roll d100 and 01-12 indicates a Man-sized or smaller target is snagged. The target must roll a save vs Petrify or be pulled off-balance and a save missed by 4 or more indicates the creature has been pulled prone (save avoids). The target can use an action to make a minor Strength (Open Doors) check to disentangle themselves or can do 4 points of slashing damage to the thong to cut it (AC 8). While snagged, the target cannot move away from the derro unless they weigh two times or more (and typically additional derro grab the thong resulting in a -1 penalty for each additional to the save each round).

Crossbow, derro (light repeating). 1d3/1d4; ROF 2/2*; Speed 5; Range 3"/6"/12"; Armor Rating Adj: 2: (+2), 3: (+1), 4: (+0), 5: (+0), 6: (-1), 7: (-2), 8: (-3), 9: (-3), 10: (-3); medium size; * repeating: ROF is 2/2 while using a clip (6 bolt cap.); changing a clip requires a major action.

Hook-fauchard. 1d4/1d4; Speed 9; Space 1; Length 8-ft; Armor Rating Adj: 2: (+1), 3: (+1), 4: (+0), 5: (-1), 6: (-1), 7: (-1), 8: (+0), 9: (+0), 10: (+0); dismount, medium size, polearm, trip); Weight 8-lbs. Use the rules above for targets of the hook-fauchard, although the chance of being snagged is 01-25 on the d100.

Savant derroes are sage-like, with the ability to use any sort of magic item and weapon. They cast spells as follows: 

They have apprentices known as student savants, or merely students. The latter know only a minor field of study and are only 25% likely to be able to use a non-fighter magic item. Derro savants have 5-8 hit dice; students have 4-7. 

Scholars will have 2-3 useful (and used) magic items of offensive and/or defensive nature, while students will have 1 lesser item. 

Savants will know 6-9 spells, students 1-3. They also comprehend languages and read magic. Performance is at 12th level of ability.

Typical magic items possessed are any potion; any scroll; rings of fire resistance, invisibility, protection, and spell storing; any wand; studded leather +1 armor and shields; any swords up to +3; bracers of defense, brooch of shielding, cloak of protection, etc.; and any miscellaneous weapons.