Masked (Level)

Masked monsters, which are shown to be "Level --", are monsters that are significantly higher level than you. Their exact level is not shown, however they are at least ten levels above your own.

• A masked monster has a greatly increased chance to hit you with critical strikes.
• At the same time, your chance to hit a masked monster is greatly decreased.
• A masked monster gives you virtually no experience. If you are in a group, your share of the experience that you receive is reduced to a small fraction of its original value (note that the share you receive is already reduced by being in a group with much higher levelled players).

Because of that, begging a high-levelled players to "boost" you is likely not a very good use of time for either of you. If you want to receive the highest possible amount of experience per kill, group up with several friends of your own level.