The Sentinels(X-Men: DOFP) vs the Potterverse
Bolivar Trask learns about the wizard/witch population of Potterverse Earth, and after convincing the U.S and U.K governments that they are a threat to world security, has a specialized army of 1,000 Sentinels built which can:
1. Sense the magical potential in any witch/wizard, and attack/kill them while avoided Muggles,
2. "See" through any Unplottable spells
3. Avoid the process which renders technology useless around Hogwarts and (presumably) Diagon Alley.
The wizards are not aware of what Sentinels are or what they can do, but have heard rumors that they are scary stuff indeed.