After promising Iris that he would take a rest after he had finished fortifying their house, Iris accepted Allen's promise as she sat on the chair that Allen had created before while spectating Allen's actions.
Since he had already dealt with Iris' worries, Allen could now start fortifying their house. Allen had previously created a magic barrier using his <Supreme Mage> before Iris and he had started their chat.
The magic barrier that Allen had created surrounded the entire house and surroundings of Allen and it wasn't a defense magic barrier but a concealment one.
After all, Allen had earlier mentioned other universes and his chat group members so if someone were to eavesdrop on Iris and his conversation, he would be forced to find an eavesdropper and either silences him by killing him or erase his memories of Iris and his conversation.
Fortunately, Allen was cautious enough to deploy a magic barrier, or else he would have to kill someone unnecessarily or waste his time erasing someone's memories.
Not only did the magic barrier that Allen had created could prevent sound from leaking outside the magic barrier, but it could also create an illusion outside that would conceal what happened inside the magic barrier.
So from the outside perspective, they could only see the house and surroundings of Iris and Allen's house and even if Iris and Allen were outside their house, the person outside the magic barrier wouldn't be able to see them.
By doing that, it would create an illusion that Allen and Iris were inside their house. When in reality, Allen and Iris were outside their house while Allen was fortifying their house.
And to be on the safer side, Allen with a flick of his finger, even added another magic barrier and it was a defensive one. So if someone were to walk through Allen's concealment barrier, they wouldn't be able to pass since Allen had added another layer of the magic barrier which was the defense magic barrier.
The defense magic barrier acted like a wall that prevented anyone from going inside the barrier but those who were inside the barrier could go outside. But those who went outside that were previously inside the barrier couldn't go inside again unless the creator of the barrier willed it.
It was one of the magics that Allen could use with his <Supreme Mage> and it was even considered an average application of magic spells. So to speak, even the <Supreme Mage> herself could use such a magic barrier and other magic spells.
And for better comparison, Allen had noticed that the power level of the <Supreme Mage> was at Highest Realm Peak Stage, the same power level as him so it wouldn't be an exaggeration to say that the <Supreme Mage> was one of the strongest <Supremes> in his world.
Even the <Supreme Martial Artist> and <Supreme Swordsman> that Allen had previously encountered at the school gate were at Highest Realm Peak Stage.
Well, Allen didn't see them as a threat to him since even if his power level was at Highest Realm Peak Stage, he could go up against a Perfection Realm Peak Stage with the trashiest foundation ever.
And besides, Allen had his <Supreme Order> talent at Highest Realm Peak Stage which meant that every <Supreme> talent that was included in the <Supreme Order> talent was also at Highest Realm Peak Stage.
If it wasn't for all of his <Supreme> talents being at the Highest Realm Peak Stage, he wouldn't dare be confident in going against all <Supremes> in his world and still coming out on top as the victor.
Well, Allen knew he didn't need to worry much even if there were the Highest Realm Peak Stage powerhouses in his world since Iris' <Supreme IA> was also at Highest Realm Peak Stage. So Iris could be considered one of the top ten strongest in his world so he doesn't need to worry too much about her safety even if there were the Highest Realm Peak Stage powerhouses in his world.
There were at least a thousand <Supremes> in his world. And since the weakest <Supreme> had the power level of High Realm Initial Stage which was equivalent to a demon lord in Axel's world, then it would be tantamount to having a thousand demon lords in one world.
That was why Allen's world was considered one of the higher tier worlds even when compared to the worlds of his chat group members.
After creating a defensive magic barrier, Allen felt that his preparations were now complete so he could start fortifying his and Iris' house without the threat of a third party witnessing his actions.
Although Allen would eventually reveal most of his <Supreme> talents due to the situations and events he would encounter in the future, he wanted for him to be the one to reveal his abilities to others and not others spectating when he revealed his abilities and that third person revealing his abilities to others.
It was two different things and as a <Supreme Hidden Boss>, he must be the one who revealed his ability to others and not the other way around. And that was why Allen didn't want anyone to spectate when he used his <Supreme> talents since that spectator would likely inform others of his <Supreme> talents and that was something that Allen didn't want to happen.
It was Allen's pride as a <Supreme Hidden Boss> to not allow anyone to reveal his talents but for him to reveal them himself. Just like when Allen didn't mind revealing his <Supreme Psychic> and <Supreme Programmer> talents to his classmates.
Allen knew that sooner or later, he would be the target of envy from his fellow <Supremes> due to him possessing multiple <Supreme> talents but not like those who envied him could do anything to him.
Even if his parents and younger brother were used as hostages by his enemies to deal with him, Allen wouldn't even bat an eyelid.
But if his enemies were to use Iris as a hostage, then it would be an entirely different story. He would make sure that his enemies would suffer if they ever used Iris as their hostage.
With that in mind, Allen thought of ways to improve the defenses of his and Iris' house so that such a scenario wouldn't happen.