This is a Very Rare Planar metal. It resembles the silver expanse of the Astral Plane, making it both good protection and camoflage at distance. It is the exclusive property of the Githyanki. All of their special Silver Swords are made from this metal, as well as the armor of any Gith of importance in their society. In addition to bonuses similar to the Green and Red Steels (affects all Planar creatures), it has the added benefit of not hindering psionic activity in the slightest (i.e. no penalties for wearing metal armor if made from Gith Mithril).

Items made of Gith Mithril weigh 30% less and cost 600x more than normal. Weapons gain +2 hit, and do 1d2 MORE damage; Armor gains a +3 bonus. All objects have +3 to saves and can strike creatures of +3 enchantment.