Mule

 is Core Gameplay.

A Mule
In Dofus gameplay, players in a group that are 50 Levels or more below the highest player are considered to be mules. This results in XP penalties and the occasional Challenge (see below). Generally, mules are Full Wisdom Characters who have assigned all their Characteristic points to Wisdom, and so do very little damage. Indeed, many such players may not even be Scrolled, and merely rely on whatever Characteristics their gear provides. Additionally, as many such players are Endgamers, they are often infamously lazy in fights, and may even forget to Pass their unused turns during Combat, thus wasting the time of everybody in the group. Nonetheless, well-behaved mules may be joyously assisted by upper-level players, especially if they are in the same Guild or Alliance, or share the same Alignment (see below).

To Mule
Upper-level players, especially, as noted above, those in the same Guild or Alliance as a mule may be more than welcome to help newer players gain some levels, often in the hope that such players will be come devotees of Dofus and future partners. However, most players have their limits, and will not devote much time to assisting those mules who are lazy or discourteous, such as those who forget to Pass unused turns or who are so weak as to be a liability in a difficult fight.

A Mercenary, or "merc", is a player who specializes in helping mules in exchange for Kamas or the Drops from particular fights or dungeons. Some even collect Dungeon Keeper Soul Stones, which they open for fixed prices at scheduled times. This practice shows how the activity of muling basically counts as another Profession. Such players will often have a variety of characters of different levels and Maged Equipment, as well as Idols, to best mule lower-level players with the least number of penalties.

Mule Challenges
Aside from the XP penalties, mentioned above, that exist when there are differences of more than 50 levels between members of a group, Dofus randomly includes challenges that are targeted to insult or disadvantage mules. These are: The weakest mule must finish all enemies off (That'll teach you to 'mule' like a Lousy Pig).
 * First the Mules

Neither mules nor allies should die.
 * Protect Your Mules