Power level
From Guild Wars Wiki
To power level is a term used to describe when a low level character gets a higher level character to kill high level monsters to give the low level character experience to level up. This is often used in Prophecies, when a low level character will get a run to Droknar's Forge from Beacon's Perch to purchase max armor. Then, they will usually use scrolls (such as Scroll of Berserker's Insight and Scroll of Slayer's Insight) to increase experience gain while a level 20 friend kills monsters around Droknar's Forge. This quickly levels up the character without much effort and allows the character to progress quickly through the game without having to complete missions and such to reach level 20.

