Summoned to Another World, but as the Final Boss [ONGOING]

(4.) Power Testing.

         After claiming the blade, we returned back to my castle, where I explained to the other 6 of my subordinates the decision to not invade the Kingdom of Evelia. They all were obviously shocked  to learn this and wished to in now whether I had been brainwashed or something to come to such a decision. Now of course, I denied this, as the Demon King of Sins is unable to get hypnotized noir mind controlled — chuck that up to one of his bs immunities that he has. Now I of course also told them about me claiming the Sacred Blade of Hope, which almost every single one of them to praise me for my 'power' and how 'nothing less should be expected of the Demon King of Sins'. After being showered in praise and admiration, I left them all in the throne room and headed back to my own bedroom - Yes, the Demon King of Sins, has his own luxurious bedroom.
However, the last thing I actually remember doing, is standing alone ontop of the castle for several hours last night, just admiring the Sacred Blade of Hope that was in possession.

Just like almost everything else in this world, seeing it in person was a whole different thing compared to seeing a flat 2D image of it. It looked gorgeous and the energy pulsing through it — even though it couldn't be infused with my body due to my nature as the Demon King of Sins, I had figured that perhaps if I had a gauntlet or something absorb that power for me and then allow me to utilise it, I could get around this obstacle. I pitched the idea to the blacksmith in the castle, who also happened to be one of my 7 closest subordinates. Y'know, the ones who were present in the hall when I first arrived to this world and awakened within this body. Yeah, he's one of those. And when I pitched the idea of a gauntlet or something like that which played that type of function, he was thrilled to get started on it almost immediately and even stated that he'd ensure to have it in my possession as soon as possible - which, knowing what I know about him from the game, would be 2 days at most.

Sooo...
I guess the only thing left to do is—

2
  days
      later. . .

         I was far out into the Dark Lands, as far away from the castle as possible, while also all alone. There was only one thing I wanted to do right now at this moment — it's to "test" or more accurately 'try out' the Demon King power that I hold now. Mainly because I have no idea how to use it noir am I confident in doing what the Demon King could do in the games main story. I mean — in the game, he quite literally created a giant storm above a battlefied to rain down lightning on his enemies - which if you ask me is a feat of power. Knowing this, I decided that if I want to get used to the Demon King power and actually take on enemies, I have to practice using this power as much as possible so I can maintain the Tyrant image in the eyes of others. That being said.... I also had no clue how to activate any of the powers.

I had no clue how to use magic, how to use the magic items in my possession - I knew basically nothing, so I had to start by figuring how to use everything first. Which is partly the reason why I came all the way out here, so far into the Dark Lands territory. I do NOT want to accidentally cause panic within the castle by using my powers near it and showing that I obviously have little to no control over them all. To be clear, I doubt that anyone from the Demon Castle would be scared upon seeing my power, since they most likely have all seen it before — however, I am scared of showing that I potentially have no control over it at all, since that could easily ruin my image as a tyrant and make them all question whether or not I was actually the Demon King of Sins that they were familiar with. Which is the LAST thing I need - my own subordinates turning on me.

Even if I am immune to basically everything.

Anyways—
I've been blabbering for too long. Time to get to the actual point of me even coming all the way out here. Time to start testing out magic and other abilities of mine. I looked around before finding a suitable target - which in this case was a boulder not too far away. The boulder was black in colour and seemed to be covered in ashes — a pretty perfect target if you ask me. Now then... In the game it simply showed the Demon King doing an action, such as raising his arm above his head or extending it in front of himself, before casting a spell. Which if I take that for a basis, could mean that realistically all I have to do is... Well, what he did. I thought about a spell to try and cast, before settling on casting one of the most basic spells that the Demon King surely would be able to cast - 'Lightning'. That shouldn't be hard, right?