Hex

A Hex is a type of spell that can be cast on an enemy target and debuffs some property of that target, such as their armor level, their energy regeneration or their movement speed while the Hex is in effect. Many hexes are available to Mesmers and Necromancers and a few are available to Elementalists and Monks.

When an ally has a Hex cast on them a purple down arrow will appear on their health bar in the party window. If the player suffers health degeneration as a result of a Hex, then his entire health bar will turn purple and begin to decrease.

There are several skills capable of removing or preventing Hexes:
 * Mesmer
 * Shatter Hex (remove a hex from ally)
 * Inspired Hex (remove a hex from ally and get it in your skill bar)
 * Hex Breaker (the next hex cast on you fails)
 * Shatter Delusions (remove a hex from foe)
 * Monk
 * Remove Hex (remove a Hex from ally)
 * Purge Signet (remove all Hexes from ally)
 * Convert Hexes (remove all hexes from other ally and give armor for each necromancer hex)
 * Smite Hex (Remove a Hex from ally)
 * Spell Breaker (you can not be target of spells (and hexes))
 * Holy Veil (creature enchantment that lets hexes cast slower)
 * Contemplation of Purity (lose a hex)
 * Dwayna's Kiss (heal bonus for each hex on other ally)
 * Ranger
 * Nature's Renewal (Hexes take twice as long to cast)