That thing eats adult dragons?
 
Do we now know why dragons haven’t conquered Equestria?

cue epic Lord of the Rings music
 
. . . Seriously, though, I’m only saying that because I have arachnophobia!

The kind of spider which gives arachnophobes nightmares .

@ShimmeringStallion  
The main character of Monster Musume reminds me of Saitama a bit: ||His face looks nondescript and poorly drawn at normal times, but that changes when things get serious. Also, there’s his preferred method of dealing with villainous(-ish) characters (who are male and human). ||

Awww man!
 
Get ’em!

@Dirty Bit  
I meant me becoming paralysed as a result of the bad joke, causing me to be unable to move.

@Dirty Bit  
I was just unsure if he knew that’s I was talking about, or if he’d confused it for that.

@The CLaUD
 
I was referring to the image SS posted, actually.

@Dirty Bit  
No idea.  
I was talking about Darkest Dungeon.  
I still can’t believe they decreased virtue chance!!! Why couldn’t it have stayed 50/50!?!?

@ShimmeringStallion
 
Ness’ Nightmare?

@The CLaUD  
I feel numb just reading that one… now I cannot move.
 

@ShimmeringStallion  
At least it doesn’t cause ***Stress!***
 
*“Anon’s resolve is tested…”*  
***”Stalwart!”***

@SilentObserver01  
I’m sure it causes status ailments, too… Who wants to bet that the SPIDER causes POISON? Ugh…

Oh fuck that dude, that one’s got a fuckin’ mana bar.

CRUSH HIMMM!!!

I laughed like a madman for a good 3 or more minutes. Especially when I look in the tags and see “This will end in one punch”, that was glorious.

@constantlime  
That already exists. Here you go.

It would be totally awesome if you could isolate that last panel, make it larger, and remove the dialogue bubbles

Please upload .PNG to match rest of comic.

@Kamazeustra  
Its not using or defending its web and its described as hunting. Its clearly not a sedentary ambush predator.
 
And the broodmother thing shows its not solitary either. So the problem isn’t how much one of those things eats, but how much a whole group of them will eat, which will be even more…
 
Lastly, the whole “eats once a week” thing relies heavily how much it eats compared to its own mass. If this thing eats 10% of its own bodymass in one meal it could go for a month without food. But thats also a 20 ton meal…  
A meal of a less than 0.0004% of its mass however will not last as long…  
The problem is less, the frequency of the meals really, than it is about the shear amount of sustenance a predator of 200+ tons would need to survive. Regardless of whether it eats 5 times per day or once per month.

@Background Pony #4831  
Spiders don’t eat like a T-rex would. If that thing is as sedentary as its hole dwelling nature suggests it can go a long time without food.

@Background Pony #4831  
Shhh…
 
^%Magic!%

So….  
What do these spiders eat normally?  
It looks like its at least 5 meters across and likely over 10 meters long. Eyeballing would put it at over 200 cubic metres of mass, so it will weigh more than that, or it can float in water.  
A T-rex would need an estimated 40.000 calories or so every day to avoid starving, but a T-rex only weights 7-9 tons. At 200 tons or more, that means that spider would need at least 22 times more. A normal person of around 80 kilos contains a total of around 110.000 calories or about 1.375 calories per kilo, so that spider would need to eat around 650 kilos of human flesh per day to avoid starvation.  
And these spiders also produce large amounts of poison and (I’m assuming) dozens of gallons of acid per day if its going to help dissolving enough rock to help something that size to dig anything, which requires more energy, so the real amount of food the spider needs per day is likely much higher, and higher still if it wants to stay well fed, and not just barely above starving.  
And that reference to a brood mother would suggest that these spiders are social to some degree, meaning there’s not just one of them down there, but groups of them.  
Just what kind of flora lives in those cave systems that can supply the equivalent of several tons of meat per day for even a few of these spider to survive? Are there tens of thousands of buffalo roaming about down there or something?  
Since ponies and humans wouldn’t really sustain a spider unless it eats a whole lot of them every day. So why would the spider hunt down a pony or two to bring back? How much is this “brood mother” going to appreciate the equivalent of a mouthful or two or food? Isn’t the spider just wasting its time going after prey as small as humans or ponies?

@The CLaUD  
I still attribute most of it to bad translation and cultural differences, though.

@Background Pony #B340  
Ooh, burn~!