Hammer drill for masonry bits, preferably of the actual hammer variety and not the crappy clutch hammers found in cheapy drill "with hammer switch action" drills. An actual hammer drill and a good bit will eat that wall like butter. Don't wave the bit around either, you want that hole to fit the spaghetti plug as tight as it can fit to get a good mount for a TV. And make sure the screws are long enough to go as far back as they can without bottoming out too early.