Anti-Crystal Area

An «Anti-Crystal Area» is a rare trap in Sword Art Online, that, as its name suggests, prevents the usage of crystals to heal or teleport.

Background
As the name suggests, this kind of trap prohibits that use of crystals, disabling the players from teleporting and healing themselves with crystals in battle. While crystals can not be used, other items such as healing potions can be used but those take longer to use.

The trap is sometimes activated in random dungeons rooms. It also occurs in the boss rooms of the 74th and 75th Floors, and implies that the boss rooms in the remaining floors are also Anti-Crystal Areas as well.

Anti-Crystal Areas have resulted in many deaths of unprepared players caught within them. One trap found by the «Moonlit Black Cats» easily claimed all its members' lives, aside from Kirito's, including its leader who did not partake in the battle but committed suicide upon hearing about the death of his comrades. «The Gleam Eyes», the boss of the 74th Floor, killed three members of «The Army», one of which was the leader of that party's squad, Cobert. «The Skull Reaper», the boss of the 75th Floor, massacred ten players who tried to examine the boss room. However, not all Anti-Crystal Areas have claimed lives. For example, the Frost Dragon's Lair did not claim any lives, as Kirito and Lisbeth eventually managed to escape from it by using the dragon as a way out of the pit.

Área Anti-Cristal