With the spell 'conjure lesser element' the spellcaster is able to learn a minor protection element that is bound in a magical object. The spell consumes one reagent typical to the element. The spellcaster can then cast appropriate spell repeatedly for the duration of the magic. Target should be one of the elements as per spell:
cold - frost insulation acid - corrosion shield magic - magic dispersion air - ether boundary electric - energy channeling poison - toxic dilution physical - force absorption fire - heat reduction