The Adversary

The Adversary is a boss that can appear:
 * In all environments of Chapter 3.
 * Only in.

Behavior

 * Quickly fires laser towards Isaac if he is seen in any cardinal direction. The beam bends slightly; following Isaac's movement
 * Flies off-screen into the air and plummets down on Isaac's position a few seconds later, creating a circular rock wave on impact which expands to 4 rings.
 * Summons 3 Spiders.
 * Dims the room, causing the Curse of Darkness effect for a period of time.

Trivia

 * He is the posthumous version of Dark One.
 * "The adversary" is one of the ways that the original Hebrew word "ha-satan" can be translated.
 * "Adversary" is the name of a level in Super Meat Boy, which Edmund, part of Team Meat at the time, worked on.
 * The Adversary appears to be a severely injured Dark One, though what caused such injuries is unknown.
 * The Adversary has a bandage on his horn in-game, but he does not on his boss portrait.
 * The Adversary is one of the three bosses that can darken the room (a temporary Curse of Darkness effect). The other bosses are Dark One and The Lamb.

The Adversary