Enchantment question

[Black Cat]

I have a weapon with a bonus damage vs. Orc/Half-Orcs (Piercing).

What would happen if I were to apply an elemental damage on it (from a rod)?

Would the damage bonus vs. Orcs/Half-Orcs get override or not?

[D Blaze]

The damage bonus from an elemental rod should not override a racial bonus.
So your weapon could have fire, cold, electric, or acid added to it no problem.
Only if you add a metal enhancement, either silver or titanium, will the bonus vs. orcs/half-orcs be overriden by newer bonuses vs. other different creatures.