Naagin 7 has launched a unique promotional campaign across the Mumbai and Delhi Metros, transforming trains into 'Naaglok Ki Train' with snake-skin inspired wraps and branding. The eye-catching visuals on busy metro lines aim to capture mass attention, with commuters sharing videos and reactions online. Social media users have responded with amusement, jokes about encountering a 'real Naagin,' and comments calling it the 'height of advertisement.' The show, starring Priyanka Chahar Choudhary, premiered on Colors TV and JioHotstar.