Clarke’s Third Law: “Any sufficiently advanced technology is indistinguishable from magic.”
These characters in fiction epitomize this concept with their devices… in some cases being able to defeat things that normally required magic through their technology.
The Doctor (Doctor Who) – The guy solves many problems through technobabble, a “not-a-magic-wand” sonic screwdriver, and the TARDIS, a ship that travels through time and space, can make pretty much anything… and is bigger on the inside.
Ghostbusters (Ghostbusters franchise, duh) – In many other franchises, you have to have access to divine or supernatural powers to get rid of ghosts. These guys and gals build their own energy weapons capable of defeating ghosts, capturing some, and blowing up others. Awesome.
Iron Man (Marvel) – Tony Stark builds a suit of armor that allows him to fly, shoot energy beams from his hands, and do many other things that would be described as magic by previous generations, so I’m gonna count it.
Seto Kaiba (Yu-Gi-Oh) – This guy recreates the feel of ancient magical games with holographic projections, and in Dark Side of Dimensions even defeats “unstoppable” ancient magic through the power of his own technology. Badass.
Technomage Elric (Babylon 5) – This is the main technomage we meet in the Babylon 5 series. They purposely and explicitly use technology to create what would have been considered magic.