Continue reading for the full teaser and more information!
The image caption reads: "Blood in the heavens. Blood on the earth."
The teaser originally debuted on various regional LoL FB:
The assumption would be this is a new skin in the popular Blood Moon skin line and the gun that resembles that of Jhin. Look for more on what this is teasing soon! The 7.3 PBE cycle starts next week.
UPDATE 1/23: Teaser for Blood Moon Jhin, Diana, Talon, and Twisted Fate
In case you missed it, 7.2 PBE cycle also included assets for a Blood Moon ward skin but it was never fully implemented.