Atlantean Trilogy Archive
An alchemist shapes a clay golem beside copper furnaces and a homunculus in a jar, with whales drifting past a sunken city beyond.

Orichalc

Alchemy, Advanced alchemical substance

Golden ingots that, forged into weapons or armor, give them magical bonuses up to +3.

From the book

Orichalc is made from 7 carats of powdered diamond and an ounce each of powdered copper, silver and gold, heated in the athanor for at least two weeks until it becomes a small ingot of golden metal about an inch long.

Added to the metal when weapons or armor are forged, each ingot lends them magical power. A dagger needs 1 ingot per +1; swords, axes, spears and the like need 2; every ten arrows or crossbow bolts need 1; staves and rods need 2; a shield needs 3; and a full suit of armor of any metal needs 7. No item can be raised above +3 with orichalc.

A failed attempt carries only a 5% chance of mishap. A dose is priced at 2000 G.P. All advanced substances call for an aludel and an athanor in a fully equipped laboratory. Each takes two weeks to make, with a success chance of 75% +1% per level of ability (99% at most).

At a glance

Ingredients
7 cts. powdered diamond, 1 oz. each powdered copper, silver and gold
Process
Heated in the athanor at least 2 weeks; yields a small (1") ingot
Dagger
1 ingot per +1
Sword, axe, spear, etc.
2 ingots per +1
Arrows, crossbow bolts
1 ingot per 10 missiles per +1
Staves, rods
2 ingots per +1
Shield
3 ingots per +1
Armor (full suit)
7 ingots per +1
Maximum
+3
Mishap
5% on a failed roll
Cost
2000 G.P. per dose
Requires
Aludel, athanor, fully equipped alchemical laboratory
Time to complete
2 weeks per substance
Chance of success
75% +1% per level (max 99%)
Skill level
Advanced Alchemical Substances is an alchemist skill from level 9
Special weapons
Special magical weapons enchanted with orichalc can gain +1-3 (rather than +1-4)