( Content Warning) I'll use the ol' reliable Butt Slam.

Let's see how much damage I can do when I don't even try at all.

As the remaining mercenaries - numbering less than 4,000 - approached the cliffside, the giant Rimuru filling their vision began to make another move. His body turned to face away from them, his slim back curtained by pale blue hair widening below the waist to a pair of eye-catchingly round butt cheeks which jiggled from their own momentum as his turn came to a stop. The sight was enough to give most of the advancing men pause, some simply trying to determine the meaning behind turning away from them, while others were all too distracted by the ass of the monster boss, with even some of those who considered themselves heterosexual helpless to keep themselves from being turned on by the male-presenting monster.

"At least a few of you must have some type of skill that let you score critical hits if your target is facing away from you, right? Lets see if you do more damage like this, then. Look, I'll even lower my [Multilayer Barrier] for you." As he said this, Rimuru raised a hand behind his head, pulling his hair over his shoulder and ensuring his entire back was exposed, ensuring he shot a smirk behind him as he did so.

Teeth were gritted. Fists tightened around their weapons. Eyes were narrowed. The monster was taunting them. It had humiliated them by killing off a couple thousand of them using its genitals while taking no damage, then turned away and left itself completely open to rub salt in their figurative wounds. With a roar, the most courageous of the mercenaries resumed their charge, inciting a similar reaction from the men around them. As these men approached, the further back lines resumed their onslaught as well, the spells and arrows now hitting Rimuru's flesh directly. It wasn't long before blunt and blade also began making contact with his flesh, albeit the flesh they were colliding with was that of Rimuru's soft buttocks which seemed to be able to repel most of the damage simply by allowing the mercenaries' weapons to bounce off.

Now looking forward, Rimuru couldn't actually tell he was being attacked. [Pain Nullification] was still active, as was his [Infinite Regeneration] Skill, so not only could he not feel the attacks being landed even with his protective barriers down, his body was regenerating from any damage done faster than the army could deal it. Allowing his mind to wander as he waited for his taunt to take effect, he looked down at his groin, which had a bead of pale blue precum gathered upon the tip, then raised his head to be met with the sight of his city in the distance.

I bet everyone would have loved a show like this had I done it for real. Heck, they probably would have surrounded the army to make sure nobody escaped my playtime. Still, there's no telling what repercussions I'd have faced in the future if I had. Using an entire army's worth of humans as sex toys would probably be harder to cover up than my defeating the Orc Disaster was. Hahaha! Imagine the look on Youm's face if I told him to take credit for this, too!

His mind absent from the battle taking place behind him, Rimuru instinctively began to relax, his body urging him to adopt a posture that took less energy to maintain than standing did. And so, with a suitable surface at about chair height already right behind him, he hopped up and thrust his backside behind him, not even really thinking about it. Naturally, the sounds of men's screams and the pleasant feeling of bodies being compressed until they popped like bubble wrap under his bubble butt yanked his wandering mind back to his current activity.

For the mercenaries below, that instant moment had played out almost like they were experiencing it in slow motion: the girlish butt they were doing everything they could to deal damage to suddenly raised up, causing several men's swings to miss entirely, while other men's attacks had been perfectly timed to land just as the rising motion began, the resulting rebound of their weapons knocking them onto their backs. The ones on their backs had the best viewing angle as the men were treated to the sight of the ass cheek they'd been attacking now looming above them, seeming to hover there for a moment as the adrenaline kicked in. Most of the men were stunned in place, being told to flee by one part of their minds and being told it was pointless by another part. A handful of men proved the latter part right by making the attempt, with none being able to make it out of the area of effect of Rimuru's ass. Their final moments were filled by a mix of fear, hopelessness, and arousal for some, along with the excruciating pain of having every part of one's body **** to share space with every other part. Their only saving grace was that the pain, though great, was brief.

<<6,000 dead.>>

Rimuru blinked, feeling surprised by himself. He looked back over his shoulder just in time to see his cheeks cease jiggling from the impact they'd made, the sight of copious amounts of blood now soaking both his glutes and the dirt and grass around them helping his mind catch up with what his body just did.

Oh, whoops. I mean, I was planning on doing that anyway, but I thought I'd draw it out a little more, y'know? Well, at least now I know how effortless killing humans really is for a monster of my stature. It might be a good idea to remain conscious of that once the simulation is over. As for right now...I'm not really satisfied with that. I wasn't paying attention so I didn't really get to enjoy how good that felt.

Rimuru shifted his attention upward a little, surveying the remaining sections of the army behind him. Once again, every man present appeared to be shocked stiff.

Looks like the reality of how screwed they are finally started to sink in. I doubt I'll be able to make any more of them step forward of their own free will. I'll need to use an ability to pull more of them forward so I can keep playing.