There seem very few devices or items that aid magic, this categories lists those mentioned.
“A wizard's staff is essentially a battery filled with magical energy. By drawing on the energy...Staff
“A Demon trap is a magic device resembling a landmine. They are created by the sacrifice of a...Demon trap
“A Mary Engine is a device of unknown function. It appears to be have been manufactured in...Mary Engine
“Whilst Mobile phones are not intrinsically magical, the destruction of their chips (whilst...Mobile phone