The Crystal Knight is a Trophy Rare Game enemy found in the Great Crystal in Final Fantasy XII. It is also fought alongside High Reavers and Reavers in the Zodiac versions' Trial Mode in Stage 82, where Crystal Knight appears when the player stands in the middle. In the Trial Mode Euclid's Sextant (uncommon) and Golden Skullcap (rare) can be stolen from it.
Crusader wearing armor fashioned of pure crystal. Hunted in Giruvegan.
To find the Crystal Knight the player must have spoken to the "Huntmaster" in Phon Coast and defeated Thalassinon, which will trigger the start of the Rare Game quest. To spawn the Crystal Knight, the player must traverse from A Vikaari Kanbhru Ra to A Vikaari Sirhru Praa to Sthaana Sagittarius and to Dhebon Jilaam Praa'dii before going back to A Vikaari Kanbhru Ra.
To put it more simply, the player must start at Way Stone XX and run a clockwise loop to the Sagittarius Gate Switch and back. This circular journey spawns the Crystal Knight. He appears on the platform with two Forbiddens. Once it has been slain, the Crystal Knight can never be hunted again so it is suggested to steal the Glimmering Robes it holds.
To reach the Sagittarius Gate Switch, from the first area of the Great Crystal the player should move one area to find and open the Scorpio Gate Switch, then move back to the previous area and take the exit to the left of the path to the Scorpio Gate Switch. This takes them to Waystone IX, which teleports the party to Waystone X, depicted on the map to the left.
Crystal Knight uses Darkga, which can hit for over 2,000 damage. It fights alongside Forbiddens. Crystal Knight's physical strikes inflict Slow. The most powerful attacks it will use is Shining Ray, which will hit for about 1,500 HP damage on the entire party. It also uses Immobilizega.
The Crystal Knight is not the most powerful of Rare Game, but still should not be taken lightly. Before the battle, the party should equip either Demon Shield or Black Mask to each party member to prevent damage by Darkga. Weapons with the Holy element damage him more effectively.
As the battle begins, the party should cast Dispel to remove its status buffs and next take out the two Forbiddens that battle alongside it. Taking them out first will prevent a lot of negative status effects on the party. When attacking the Crystal Knight, one party member should hold back for healing and casting Haste to cancel out Slow. The battle is a lot easier if the Crystal Knight is silenced.