Ajax's Plan

A Summoning Master can form only one official contract with the elemental spirits for every different realm like Soldier, Commander, General, King and Emperor realms in his cultivation.

And once the Summoning Master forms a contract with an Elemental Spirit, whether it is official or unofficial, it can't be changed.

Hence, when Ajax's three new elemental spirits heard his words about upgrading their contracts with him from Unofficial to Official, they were shocked and they asked Ajax for confirmation.

"I know it is very hard to believe for you guys; however, I have no reason to lie to you, right?"

Ajax had already expected such reactions from his three new elemental spirits as he replied to them with a question while maintaining a slight smile on his face.

Since these three elemental spirits had already formed unofficial contracts with Ajax, they were completely under his control and there was no reason for Ajax to lie about such a thing to them.