Whipper

Whippers are fiendish enemies that wield long fleshy whip-like tendrils which they use for a short-range melee attack. They wander around the room in straight lines and charge at Isaac if he lines up with them. They open their mouths when charging to show that they are attempting to harm the player. If the player gets too close, they will slash their whips at him, damaging Isaac if he is too close and deflecting nearby tears. Whippers will also whip at placed bombs.

Snapper
Snappers are much more dangerous versions of the Whipper. They possess a much longer, fleshy whip that can extend across the room, at the minor cost of decreased attack width. They behave similarly to normal Whippers but will snap their whips at Isaac if he lines up with them instead of charging.

Lunatic
Lunatics are even more mutilated versions of the Whipper. They wander around the room in straight lines, charging at Isaac relentlessly if he lines up with them. However, they constantly swipe their whips back and forth as they charge, damaging Isaac if he gets caught and deflecting tears much more frequently than regular Whippers. Lunatics are also more aggressive than regular Whippers and will chase Isaac for a while instead of simply charging once.

Trivia

 * The whipper was first teased by artist NotYourSagittarius during 2016 April fools.


 * Whippers are considered to be "one of the ugly second cousins of the Knight, [who] are not so fortunate as to have a face of stone" by the Binding of Isaac Antibirth website.
 * The sound used for the Whipper's attack - is the sound used for the Disciplinary Action, a Soldier weapon in Team Fortress 2.