I based this mainly on the Modron supplement from Dragon Magazine, as well as the free addition for the planar handbook found on wizard's website. Also, I took the lore rule from The Great Modron March, meaning any modron that goes rogue, automatically becomes a Quadrone.

Mostly just wondering to see if I got the level adjustments and such right. I believe four arms are already worth an extra LA, though the superior weapon fighting ability is very tricky to place.

Quadrone as Character

- +6 strength, +4 dexterity, +2 constitution, +2 intelligence, +2 wisdom.
- Medium size.
- Base land speed 50ft.
- Outsider: Darkvision 60 ft, cannot be raised or resurrected, only by wish, miracle or true resurrection can a Modronís life be restored.
- Racial Hit Die: 4 levels of outsider (4d8HD, +4 BAB, +2 base saves)
- Racial Skills: 8 + int modifier,
- Racial Feats: Simple & Martial weapon proficiency.
- +4 natural armor bonus.
- Extra limbs: Four arms & Superior Multiweapon Fighting (ex).
- Modron Traits: Immune to mind-influencing effects; not subject to subdual damage, ability damage, ability drain, or energy drain; not subject to critical hits.
- All-Around Vision (ex): Can see in all directions at one. +4 racial bonus on Spot and Search checks. Cannot be flanked.
- Resistances (ex): Acid, Cold and Fire resistance 10.
- Automatic Languages: Modron, Celestial.
- Favored Class: Fighter.
- Level adjustment: +4.


Savage Species Level Progression

{table=head]Level|HD|BAB|Fort|Ref|Will|Skills|Special
1|1d8|+1|+1|+1|+1|(8 + int mod) * 4|All-Round vision, +2 str, +2 dex
2|1d8|+1|+1|+1|+1|8 + int mod|Natural Armor +1
3|2d8|+2|+2|+2|+2|8 + int mod|+2 str, +2 con
4|2d8|+2|+2|+2|+2|8 + int mod|Acid, Cold & Fire Resistance 5, Natural armor +2
5|3d8|+3|+3|+3|+3|8 + int mod|+2 str, +2 dex
6|3d8|+3|+3|+3|+3|8 + int mod|Extra arms & Superior Multiweapon Fighting, Natural armor +3
7|4d8|+4|+4|+4|+4|8 + int mod|+2 int, +2 wis
8|4d8|+4|+4|+4|+4|8 + int mod|Acid, Cold & Fire Resistance 10, Natural armor +4
[/table]


Alternative Quadrone as Character

- +2 to intelligence, -2 to charisma
- Medium size.
- Base land speed 30ft.
- Racial Skills: 8 + int modifier,
- Racial Feats: Simple weapon proficiency.
- Extra limbs: Four arms & Superior multiweapon fighting.
- Modron Traits: Immune to mind-influencing effects; not subject to subdual damage, ability damage, ability drain, or energy drain; not subject to critical hits.
- Outsider Traits: Darkvision 60 ft, cannot be raised or resurrected, only by wish, miracle or true resurrection can a Modronís life be restored.
- All-Around Vision (ex): Can see in all directions at one. +4 racial bonus on Spot and Search checks. Cannot be flanked.
- Automatic Languages: Modron, Celestial.
- Level adjustment: +2.


Flavor Rules

- Hierarchy: Quadrones gain a +10 diplomacy check when giving instructions to Tridrones.
- Quadrones can acquire a set of wings from a skilled craftsman. These wings cost 8000gp. When installed, the Quadrone loses his extra set of arms and the Superior Multiweapon Fighting feat, but gains a fly speed of 80 ft. (good).