Extermination
Lex's plan was to simply remove the problem from its roots and remove any internal threats or issues that may cause him problems in the future while he resided in the Earth Country.
His hate for Elder Mason hadn't lessened in the slightest, and instead of being reckless and getting himself killed, as he obviously wasn't immortal or capable of defeating the entire Voltiac Guild head-on, he decided he would break down his manpower and organisation.
Another unknown variable that Lex had to account for was Elder Mason's power and whether he had any backing that he had to be wary of.
The four of them travelled back to the centre of the Earth Country at incredible speeds and as the citizens saw the Earth Leader, they cheered and sung songs of praise.
Ella had put on a black robe with a hood, that Lex gave her, to cover herself as not to catch the attention of the people as she didn't like being in the public eye.