Looking Glass Knight

The Looking Glass Knight, also known as the Mirror Knight, is a boss in Dark Souls II. It can be found in the King's Passage.

General information
The fight against the Looking Glass Knight takes place at the top of a castle structure during a lightning storm. This boss will use physical attacks against the player as well as using it's sword as a sort of "lightning rod". It's shield deflects magic, causing blocked spells to fly off in a random direction.

The knight's shield also the shape of a mirror and when it plants it into the ground, it will summon a hostile NPC or another player as a hostile enemy to the fight (like the Old Monk in Demon's Souls), in addition to planting its shield in the ground, it will also stab it's sword into the ground if it is summoning a player. It can summon a maximum of two phantoms and will continue to summon replacements throughout the fight if one of them is defeated.

While fighting this boss offline, he will summon a randomly generated enemy AI instead of human players. While the Looking Glass Knight is summoning, the players can take advantage of the situation to attack him until he staggers, thus cancelling the process of summoning. NPC phantoms will not use their shields.

Lore
The Knight serves as Vendrick's lieutenant and before the King's fall and the collapse of his kingdom, would test the skills of warriors who wished to serve in the order of royal knights. Those unfortunate to fail the test met a grisly end. He continues to challenge individuals who cross its path.

Summoning
Benhart of Jugo can be summoned for this boss.

Attacks
Leap: Leaps into the air in the player's direction

Charge: Charges forward and proceeds to lunge at the player. Only used when the player has retained some distance

Summon: Places the shield on the ground and proceeds to summon an NPC, or when online summons a player. This move takes several seconds to complete and is possible to stagger him out of it

Lightning Blade: Uses the lightning to electrify it's sword and makes a horizontal swing in the player's direction. The sword is only imbued for that one attack.

Balls of Lightning: Uses the lightning to electrify it's sword and makes a horizontal swipe that shoots out five electricity balls

Lightning Trail: Uses the lightning to electrify it's sword and performs an overhead attack that sends a lightning trail that follows the player

Trivia

 * Defeating this boss will unlock the Achievement/Trophy "Looking Glass Knight", worth 20 Gamerscore or a Silver Trophy respectively.
 * The Looking Glass Knight resembles the Old Monk from Demon's Souls, in that both bosses are able to summon other players or NPCs to the fight. However, this time the players will have to face both the boss itself and the invaders at the same time and not only the invader. Another difference is that while the Looking Glass Knight is able to do this multiple times, the Old Monk can summon only one invader per fight.
 * While playing online, in the corridor before the Looking Glass Knight's arena, players will be able to see several candles. According to Yui Tanimura, whenever any player online is killed at the hands of the Looking Glass Knight, a new candle will be lit, and other players will see it in their own worlds.
 * If the player is chosen to be summoned by the Looking Glass Knight, the player will be sent a message saying, "The Looking Glass Knight summons you! Become a Mirror Squire, and vanquish the world master."