[It was so obvious, she could do little more than knowingly grin at him before taking the diary he was holding and flipping it right-side up.]
Basically, anything that could be remotely interpreted as magic. Spells. Symbols. Rituals. Most of them are nonsense, but there are a few actually based in real ancient traditions. If we're lucky, something close enough to whatever it is they've been using on us, here.