Frankly, Lu Li was quite touched by the proposal.
This group was obviously not the kind that liked taking in weak players just to show off how strong they were. They saw that Lu Li was a lone Thief in this high level area, and knew that it would be difficult for him to level.
Unfortunately, Lu Li's intention wasn't to train, so he could only disappoint them.
The Lich that Lu Li had chosen to practice on had incredibly high Detection. Thieves that were at the same or lower level had almost no chance of hiding within eight yards of this creature.
Even though Lu Li was three levels higher than it, he still had to be careful.
The Plaguelands Lich was born thanks to Kil'Jaeden, an elder member of Eredar. The wisdom of this Demon Lord was as great as his strength, and his research into souls was particularly appreciated by Sargeras the King of Demons.
He transformed his captive Spell Breakers and turned them into powerful Lichs.