From Commonplace to Remnant Strongest (RWBY X OP Male Reader) [Volume. 1]

Level 10

Y/n Pov

Now I actually trap in a dungeon that full of strong Grimm.
And a way to get out from this place is to kill the [Boss].
Then something across my mind.

Y/n: Actually, how strong the [Boss]?

I thinking while walking around try to find the [Boss] until...

???: Roar!!!

I hear a roar and see...

A big Grimm and I never see before.
What the..???
I quickly use [Stealth] and [Observe].

Name: Leo
Rank: General
Race: Beast King Grimm
Lvl: 150,000
Skill: Grimm mind control, Roar of Disaster and Smash Impact

I jaw drop and pale at this.
It level is more high then me.
Can I win if I fight it.
And also what it skill can do?

Leo [Skill]:

Grimm mind control: Leo can control any grimm that level is lower then him. He can't control a grimm that is high then him and that is the [Boss].

I pale at this.
If this is Level 150,000.
How strong is the [Boss]?
I then look at his other skill

Roar of Disaster: When Leo use this skill he can call a meteor shower that strong enough to wipe a Kingdom.
Cool down 20 minutes.

Smash Impact: When Leo use this Skill he can make a giant hole at the ground with a punch.

I just find a destroyer right here!
Now I is screaming in my mind...

My mind: Curse you, Decade!!!

*In [Remnant Decade] Dimension*

Y/n: Achoo!

Ruby: You ok, brother?

Y/n: I ok, just feel like someone is cursing me.

Ruby: If you say so.

Ruby said then walk while holding Y/n hand.

Back to present.

I then calm down and think a plan.
When I look at the Grimm I see something I not expected...
It look at me back.

Y/n thought: What the!!!

It then attack me.
Wait.
How he know I over here?

*Ding*

[Because Leo have a good sense he can spot every thing around him]

I surprise at this.
I deactivate [Stealth] and face him.

Y/n: So you can see me, huh?

Him then make me more surprise because...

Leo: Who are you, human!?