Death

 causes a character to collapse and become unable to fight or interact with the environment. Upon dying, you will lose 1% of whatever EXP you've earned since leveling (3% for non-VIP). When in status, you can still talk and trade with other people.

Dyng is the only way to prevent a character from leveling up.

Abilities
occurs when a character's HP falls to 0.

Cure
can be cured through the following methods:
 * Priest's skill Resurrection can undo the effect.
 * Yggdrasil Leaf

Prevention
There is no way to prevent.