Buff

A Buff is a positive effect on players and NPCs that lasts for a predetermined amount of time. Buffs are usually applied to characters by: using items, using skills, gathering from nodes, and can be given to you by other characters.

Buffs usually increase a characters HP, MP, or stats. Sometimes a buff has no immediate effect, but merely prevents debuffs from being applied, resurrects a character when dead, or shows a special effect.

Here are a few examples of buffs:
 * A Priest may buff their party by casting.
 * Gathering can give you the buff Gathering Aura, which increases Gathering Speed by 4%.
 * Drinking will give you a powerful buff, increasing many stats at once.

Debuff
Conversely, a Debuff is a negative effect on players and NPCs that lasts for a predetermined amount of time. Debuffs are usually applied to characters by: using skills and fighting BAMs, Mobs and other players.

Debuffs usually reduce a characters HP, MP, or stats. They may also immobilize or silence a character. Sometimes a debuff has no immediate effect, but will lead to a worse debuff unless cleansed.

Here are a few examples of debuffs:
 * Lancers can cast on an opponent, decreasing their movement and attack speed by 15%.
 * Getting hit by one of Shandra Manaya's attacks will give you the debuff Argonic Metastasis, which can turn into System Seizure and kill the player.
 * Priests can cast on opponents to remove all buffs and inflict damage for 15 seconds.

Examples of Use

 * You could say, "Thanks for the buff."
 * Someone could warn you, "Don't get hit or you'll get a horrible debuff."