Knight

The Knight is a special type of enemy that can only be damaged from behind. However, explosions or shots that pierce enemies, such as Brimstone or Cupid's Arrow, will allow damage to be applied from any direction. The Knight walks about randomly, but once the player is directly in front of it, it will dash toward the player at a slightly faster speed until it hits a wall.

Variations

Selfless Knight

Can rarely replace a regular Knight

The Selfless Knight has a similar appearance to an ordinary knight but has a face on its back instead of a brain. This version is much faster than the normal version, especially while charging.

Floating Knight

The Floating Knight is similar to the ordinary Knight, but has the ability to fly over all obstacles. It is also a little slower.

Bone Knight

The Bone Knight is similar to the ordinary Knight, but leaves behind a trail of damaging red creep, making it much harder to attack its vulnerable side. Its charge is faster than an ordinary Knight, but not as fast as the Selfless Knight.

Notes

• The Knight is actually a monster in two segments: an invisible, invincible "shield" segment that leads the way, and the visible "body" that follows close behind. The shield takes no damage and partially covers the body, stopping shots that would damage it; but piercing tears and explosions hit both the shield and the body, defeating this defense.
  • Sometimes when a Knight changes directions it appears to pause for a moment; this is because the shield segment is moving past the body segment, and the body won't move until the shield moves away from it, the same way the trailing segments of Larry Jr. or Buttlicker chains behave.
• The Knight and its variants are briefly invulnerable when they spawn, or when you enter the room they are in. They become vulnerable when they start moving.
  • In the original Binding of Isaac, Knights were completely vulnerable when they spawned; the shield segment did not cover the Knight's front until it started moving, so you could shoot it in the face for damage as soon as it appeared.
• Flush! does not work on Knights.
• Items that provide a fear effect (like Dark Matter) work remarkably well because they run away from the player, exposing their weak side.
• The name of the monster is a reference to the Darknut (also known as Tartnuc) knights from The Legend of Zelda that, similar to The Binding of Isaac, cannot be harmed from their front.

Bugs

Bug! Floating Knights cannot fly over key blocks.

Bug! The hitbox of Dark Red Champion Knights (and their variants) do not change when they crumble into goo, and they must be shot from the back in order to damage them.

Bug! Knights are briefly invincible during their spawn period.

Bug! If Isaac charms a Knight and it is the only enemy in the room, the Knight will chase Isaac but will not charge, making the Knight more difficult to damage until the effect is gone.