Does the title suggest fluff perhaps? It is not, I promise you.
I would really like to know stuff that can be used in order to neutralize, disable, and otherwise nullify magic.
Herbs, crystals, substances, you name it.
For example, let us assume that an individual is casting some spells and you want to induce upon him the effects of binding, but without a spell or using magic yourself. Bonus if you can find something that can nullify or even undo the spellwork set up by this individual. Again, without using magic yourself, or without utilizing spellwork.