Reagent

A reagent is a general term for any sort of material or object required to work a spell or ability in Diablo III. The term may refer to scrolls, potions, materials, or any other sort of ingredient required to accomplish something.

For instance, Bashiok used the term when describing the removal of the resurrection scroll.[1]

Co-Op resurrection mechanic getting changed up. No more reagent. -- Diablo

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