In recent years, a growing community of researchers have been applying ideas from Quantum Information / Computing theory to high energy physics. Entanglement is one such quantity, but there are by now many others. This talk will examine the property of “magic” (also known as “non-stabliserness”) which, roughly speaking, measures whether quantum systems have a genuine computational advantage over their classical counterparts. I will review the origin of this concept, before describing recent applications from both collider physics and scattering amplitudes research. No prior knowledge of quantum computing will be assumed.