Metallurgy Domain
The Metallurgy Domain makes worked metal a sacred craft: shaping it, heating it, corroding it and striking through its defences. This d20 3.x domain comes from Dominique Crouzet’s Celtic Druids and the Tuatha de Dannan and is associated with Goibhniu.
At a Glance
| Divine Sphere | Metalworking, smithcraft, iron, weapons and crafted metal |
|---|---|
| Rules Tradition | d20 3.x third-party domain |
| Granted Power | Three times per day, strike a metal target while ignoring its hardness or damage reduction |
| Associated Deity | Goibhniu |
| Play Style | Anti-armour utility, crafting magic and battlefield control through metal |
Edition Applicability
The Metallurgy Domain here is a d20 3.x third-party domain. It is not presented as an official D&D 3.5 SRD, Pathfinder 1e, D&D 5e/2014 or D&D 5.5e/2024 domain.
Metallurgy Domain — d20 3.x
Granted Power
Three times per day, you can strike an object or creature of metal and ignore its hardness or damage reduction for that strike. Examples include a steel weapon, iron door or iron golem.
Metallurgy Domain Spells
| 1st | Make Whole (metal items only) |
|---|---|
| 2nd | Heat Metal |
| 3rd | Keen Edge |
| 4th | Rusting Grasp |
| 5th | Wall of Iron |
| 6th | Blade Barrier |
| 7th | Metal Shape |
| 8th | Repel Metal or Stone |
| 9th | Iron Body |
How the Metallurgy Domain Plays
Metallurgy rewards a cleric who expects armour, weapons, gates, constructs and crafted objects to matter. Its granted power is situational but decisive against metal defences, while the spell list grows from repair and heating into reshaping, repelling and becoming living iron.
Goibhniu and Sacred Smithcraft
Goibhniu is the established patron of this version of the domain. Metallurgy expresses the smith’s mastery of worked metal rather than the broader making covered by the Craft Domain.
Priests, Forges and Sacred Duties
Metallurgy priests bless forges, judge the quality of arms and armour, repair vital tools and protect communities whose survival depends on metalwork. Their temples naturally overlap with workshops, armouries and guild halls.
Related Domains and Character Options
Rules Sources and Licensing
Source: Dominique Crouzet, Celtic Druids and the Tuatha de Dannan. The mechanics are preserved as d20 3.x third-party material.