Minimizing Arcane Spell Failure with an armored Warforged

Question

I'm starting out playing with a warforged in a D&D 3.5 campaign. I'm looking to minimize ASF – the concept behind this character is to play a sorcerer that specializes in touch attacks and uses slam attacks for opponents that have damage reduction / resistance / etc. Level range is 10-15.

My first angle was trying to track down information about docents – specifically the Arcane Sigil – or pretty much anything that would help me counter the arcane spell failure inherent to the mithral plating.

Is there a specific book, etc., I should look for for these details? I've already gone over the Monster Manual 3 and Races of Eberron.

Answer 1

The only “Arcane Sigil Docent” I can find is from Dungeons & Dragons Online, and is not available in the tabletop game (that I can find, but I have read most of the Eberron books).

Usually a Warforged arcanist would take Unarmored Body, rather than Mithril Body, so as to avoid any Arcane Spell Failure at all. A 5% chance of even casting the spell correctly, on top of whatever chance you have of missing or the enemy resisting, is going to hurt a lot.

Note that if you want to be a bit cheesy (in some groups this would be fine, in others it’d be broken; depends on your group), Dragonborn from Races of the Dragon is an amazing template with Warforged, and would be perfect for a Sorcerer (who usually have some relation to dragons to begin with. Dragonborn replaces your racial features, but you retain any Subtypes you have. Since most of the best features of Warforged come from the Living Construct subtype, they keep all of those, losing primarily the composite plating and Slam attack. Since you want to get rid of (parts of) the composite plating anyway, this is a win-win.

The immediate answer to Arcane Spell Failure is usually the twilight armor enhancement (+1 equivalent), found in Player’s Handbook II and the Magic Item Compendium. It can be applied to Warforged composite armor, and reduces Arcane Spell Failure by 10%.

Other good answers, things like Thistledown (Races of the Wild), Feycraft (Dungeon Master’s Guide II), and Githcraft (Dungeon Master’s Guide II), all of which reduce Arcane Spell Failure by 5%, probably cannot reasonably be applied to Warforged composite armor. Even if they can, they’d almost definitely have to be part of the Warforged’s original construction (though a Githcraft Warforged would be awesome).

Again, note that with Unarmored Body or Dragonborn, you could wear a Feycraft-or-Githcraft Mithral Chain Shirt with Thistledown Padding, which has 0% Arcane Spell Failure before putting any magic on it. This is a great armor.

The Spellsword prestige class from Complete Warrior can allow you to ignore 10% of Arcane Spell Failure; combined with twilight, this reduces your Arcane Spell Failure to 0%. I strongly recommend against taking more than one level of Spellsword, however, since it loses a ton of spellcasting.

Answer 2

Complete Mage says something useful via a Fighter alternate class feature:

http://www.wizards.com/default.asp?x=dnd/ex/20061010a

you'd have to multiclass into Fighter, but you could do it:

Choose one arcane spellcasting class, such as sorcerer. You can avoid any chance of arcane spell failure for spells gained from this class as long as you restrict yourself to light armor and light shields. This training does not extend to any other form of armor or shields, nor does this ability apply to spells gained from other spellcasting classes.

Only, ouch:

This benefit applies only to spells of a level equal to or lower than your fighter class level + 1.

The only other thing I can find is the Battle Caster feat, which is apparently from Complete Arcane, page 75. It lets a character ignore the Arcane Spell Failure chance of heavier armors, but only if they already have such an ability that applies to light armor.

Basically the text of this feat should read "Bards can wear heavy armor. The rest of you can go to Khyber."

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Update: Apparently there are other ways to do this, but none of them are very good (Various prestige classes, some armor echantment from Book of Exalted Deeds). Honestly, 3rd Edition is built around making it hard for arcane casters to wear armor, so I don't think you have good choices.

My best advice isn't actually a direct answer: I think you should ditch either the class that gets you the ASF and go into Artificer instead, or else take Unarmored Body from Races of Eberron and ditch Mithral Body, which will let you keep the ASF class (Wizard I guess?). You have to give up one of the things you want either way, but you'll still be able to do arcane things with a Warforged.

Answer 3

There's an armour enhancement in the Magic Item Compendium called "Twilight." It reduces the arcane spell failure penalty of the enhanced armour by 10%, and costs the equivalent of a +1 bonus. Since a Warforged's built-in armour plating can be enchanted as armour, it's an option you might want to consider.

It's not enough to completely negate the spell failure penalty, but it's the 15% to 5% reduction you were looking for, and there's probably something in one of the other answers that you could stack it with.