How about, quite literally, an orbital cannon? An object or vehicle thing that gets placed up high and the fires a death-ray at a target painted by a laser tagger.
Perhaps this would be even simpler to have this ability as a property of a brick, like Space Guy's Wrench Events. Build an invisible (or slightly visible) structure to the sky with a cool looking satelite on it, and make one of it's peices the designated death-ray piece. In theory, this could be placed any where, and destroyed!