Here is another on of the bad guys you encounter in Columbia. The zealot, more commonly known as a crow, uses the murder of crows vigor to "teleport" around and attack their enemies with swords rather than guns.
From the games perspective they're extremly anoying to face since they can't be harmed while in Crow form and their attacks do a lot of damage as well, but as long as you see them comming you should be fine. The shotgun is obviously really good against them since you fight them face to face most of the time.
Bioshock Infinite (c) 2k
Art (c) me