Elemental hammer

This spell is cast upon a weapon. The next time the
figure wielding this weapon wins a round of combat
and does at least 1 point of damage, this weapon
inflicts an additional 5 points of
elemental magic damage. If cast on a normal
weapon, which is then used against a creature that is Immune to Normal Weapons,
this weapon will only deal the 5 points of elemental
magic damage. If cast on a bow or crossbow
the spell only applies to the next attack.