((speaking of meatshields))
Kaiser shrugs.
An ancient rune sits, barely glowing, under the London sun, completely unnoticed for many generations. Finally fading, the rune disappears with a soft 'plink'. A passing child hears it, and looks over in the direction that the noise came from, to see a large purple orb of light materialise out of thin air, along with a loud keening noise. Large arcs of energy fly off, one stray arc frying a nearby lamppost. People run for cover as the noise reaches a climax, and...
The orb disappears with a dissatisfying pop, leaving a man with a sword sitting where the centre of the orb was. Feeling that they've been let down (or trolled), some people walk off, while a few others approach the man, phone cameras still filming.
"Are you okay?"
"I am well, I was merely imprisoned by the foul workings of a mage. Garrett d'Avre, Dragonknight, at your service."
Garrett does a little bow, before looking over the small crowd gathered around him
"Why are you holding those small square objects, and what manner of garment are you all wearing?"
He stands up, drawing his sword and backing into a lamppost. He notices, turns around and cuts through the lamppost with a swift motion, using the momentum of the sword to swing back around to the crowd. They look on with confusion.
"I am armed, brigands, now begone!"
The crowd scatters, while the lamppost topples over and crushes a telephone box. Seemingly satifisied, Garrett walks around London, confused and in awe of the weirdness that is the 21st century.
In the process, he attacks a bus("I have freed you from the steel beast's belly, you may leave safely now."), sits and talks to a TV screen in order to try and save the tiny people inside, marvels at the giant size of some of London's buildings, and otherwise generally causing a large amount of destruction. This quickly gains the attention of the media and the police (and maybe Ashley).