A Damaged Knight is a pale, battered knight covered in Nightmare Fuel. It has same base stats as the Clockwork Knight and drops 1 Gears, plus has a chance to also drop Nightmare Fuel and/or Thulecite Fragments. It occurs naturally in the Ruins, but also has a chance to spawn from Broken Clockworks when they are destroyed.
The player can spawn an allied Damaged Knight (or any other chess piece) by using 3 Gears to repair a pile of Broken Clockworks.
A Knight's main purpose is to guard the Wooden Thing. They are seen sleeping near it along with some Clockwork Bishops and a Clockwork Rook. When a mob or the player gets close, the Knight will stand up and stare at the creature, and if the creature gets close enough, the Knight will do a war cry and charge at it, using its springy neck to headbutt when it gets close. The Knight will then attempt to kite. If the knight is followed, it will usually try to headbutt once more, then it will do its war cry again. The Knight cannot be stun-locked and does not respawn.
A recommended way to kill Knights is by kiting them. When in groups, it is recommended to separate one from the rest of the group, killing it, then separating another. As they usually do their battle cry before attempting to attack again, players may find it effective to attack a Knight while it is doing this, then backing away as soon as it tries to headbutt the player.
Befriending at least 5 Pigs can easily kill all the Knights and other Clockwork Monsters around the Wooden Thing. Alternatively, the attacks of the Clockwork Rook will damage them. With a bit of timing and luck, a Rook can be used to destroy the other Clockwork Monsters. When trying to kill a Knight for its Gears, a death by fire will cause it to drop Ashes.
Below is the number of hits it takes with each weapon to kill Clockwork Knights when playing with characters with a default damage modifier. The Weather Pain is not included due to the random nature of its projectile.