I would like to request this armor enchantment from 3.5 DnD to be house ruled into allowed armor enchantments. :)

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Twilight

Enhancement

(Book of Exalted Deeds, p. 112)

Price: +1 bonus

Property: Armor

Caster Level: 5th

Aura: Faint;

Activation: —

This suit of armor, favored by eladrin spellcasters, becomes semi-incorporeal and translucent when donned. It also possesses a faint sunset-colored sheen. The twilight armor reduces the chance of arcane spell failure by —10%

I've copied from what Mr. Blues stated in the forum post asking about Monkey Grip.

At this time the staff isn't considering custom content requests. Each deviation from the established approved book content is a potential point of player contention and accusation of favoritism. All previous house rule augmentation to the core rules have been to keep in line with previous established setting continuity and were deliberated by all the staff before starting the new system. Only by staying with the current approved source books can we hope to avoid most of the pitfalls of custom content.