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
An Anti-Crystal Area is a rare trap that is sometimes activated in random dungeons, it's assumed that boss rooms starting from the seventy-fourth floor all are Anti-Crystal Areas. 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.

Área Anti-Cristal