Grabesruhe

I felt uncomfortable, approaching the church -- not for any weirdo quasi-mystical reason. Just because I'd never been comfortable with churches in general. The Church had killed a lot of wizards in its day, believing them in league with Satan. It felt strange to be just strolling up on business. Hi, God, it's me, Harry. Please don't turn me into a pillar of salt. (chapter 9)

Thaumaturgy is traditional magic, all about drawing symbolic links between items or people then investing energy to get the effect that you want. You can do a lot with thaumaturgy, provided you have enough time to plan things out, and more time to prepare a ritual, the symbolic objects, and the magical circle.
I've yet to meet a slobbering monster polite enough to wait for me to finish. (Harry, chapter 16)