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This rare metal combines the weight of lead with the strength of steel. Orcs prize it for weapons because the extra weight allows a skilled user to strike with more force.
Using a thorium weapon properly requires the Exotic Weapon Proficiency (thorium weapons) feat. A character wielding a thorium weapon with which he is proficient applies 1-1/2 times his Strength bonus, or double his Strength bonus if wielding a two-handed weapon, on damage rolls for melee attacks with the weapon. So, a hero with a +3 Strength modifier has a +4 bonus on damage rolls when using a one-handed thorium weapon with which he is proficient and a +6 bonus when using a two-handed thorium weapon with which he is proficient.
Thorium armor is amazingly heavy and strong — only adamantine pierces it with any degree of reliability. Armor made from thorium has a nonmagical +2 enhancement bonus to AC and provides damage reduction 3/adamantine if it is light armor, 6/adamantine if it is medium armor, and 9/admantine if it is heavy armor. (A thorium shield provides no special benefit.) Thorium armor is considered one category heavier than normal, to a maximum of heavy. (The damage reduction values given above apply to the armor before this adjustment — that is, a thorium chain shirt provides damage reduction 3/adamantine, even though it is medium armor). Thorium reduces the maximum Agility bonus for a piece of armor by –2 (to a minimum of +0); furthermore, both the armor check penalty and the arcane spell failure chance are doubled.
An item made from thorium weighs twice as much as the same item made from other metals. In the case of weapons, this heavier weight does not change a weapon’s size category or the ease with which it can be wielded (whether it is light, one-handed or two-handed). Items not primarily of metal are not meaningfully affected by being partially made of thorium. (A bullet can be a thorium weapon, while a whip cannot be.) Weapons, armor and shields normally made of steel that are made of thorium have twice as many hit points as normal.
Weapons or armors fashioned from thorium are always masterwork items as well; the masterwork cost is included in the prices given below. Though thorium armor is masterwork, the armor is so heavy and unwieldy that the masterwork quality does not reduce the armor check penalty — thorium armor must be masterwork to function as armor at all. Thorium has 40 hit points per inch of thickness and hardness 25.
|Type of Thorium Item||Item Cost Modifier|
|Light armor||+12,000 gp|
|Medium armor||+24,000 gp|
|Heavy armor||+36,000 gp|