Lu Li had nothing to lose!
Orders from the Grand Master must have been sent to the forces and families at the Central Plains. The four forces, in particular, must have received warnings. Anyone daring to kill Lu Li openly within the 10 years would be challenging the authority of the Grand Master.
Grand Master of the Demon-slaying Hall, the supreme warrior in the world!
He had been in the position for more than 1000 years. The authority of Grand Master was deeply rooted in the minds of many. He could cover Lu Li for 100 years, not to mention merely 10 years, and the families still wouldn't have any opposition. Openly, nobody dared to make Lu Li trouble unless extermination of their families was what they were wishing for!
Therefore, Lu Li was not sacred of the 12 Royal Families now. It was within his power to punish the family that caused disturbance at the Northern Desert. Nobody could kill him openly. Differently for him, he could exterminate the trouble-making disciples.