Pull

Sometimes referred to as "luring", pulling means to carefully approach a large group of mobs with intent of aggroing only a small amount of them, preferably one.

In Guild Wars, enemies have a tendency to cluster together in large groups that can quickly overwhelm even a powerful, experienced party with their superior numbers. By judicious use of the aggro bubble, an experienced puller can draw a small number of enemies away from the rest, towards his/her party waiting a short distance away, making for a much more manageable fight.

Note that pulling is difficult when NPC allies, such as Henchmen, pets or a Necromancer's animated corpses are involved. These have the tendancy to rush forward and engage any enemy in melee when attacked, often aggroing the entire group. Therefore a player who has NPC allies following him should stay well to the back when a member of his party is pulling.

Pulling can also be more difficult against certain mob groups such as Hydras or Minotaurs, which tend to move quickly and erratically.