Aldrum

White anti-magic metal, with the consistency of iron and a frequency of gold. This metal can drink in magic- absorbing spells and destroying wards. More powerful spells take more aldrum to absorb.   It does not cap out; as aldrum never runs out of draining ability, it never runs out of space.   If a chunk of aldrum is left near a ward it will eventually get through- but if an archfey (Gentry) but up that ward, it would probably take millennia   (Anything directly made by the gods is expempt from Aldrum - altars, items, locations, etc)