Perhaps it simply corresponds to no longer requiring subtlety.  Diana's not taking the risk of assuming that whatever she's about to stumble into, as she jimmies the lock open on this abandoned house, is stupid.  That way lies cheap deaths.

The door swings open easily; the lock has already been broken. The first floor shows the tell-tale signs of someone having moved into an abandoned building; footprints in dust, a backpack propped by the door, a pile of empty cup-noodle packages, and the locked door on the basement door cut open and the door left swinging in the breeze, just like the front door. No sign of an actual person, and the bangs are getting louder. That last one was ear-damage threatening, at this range. 

Good thing she could fit proper hearing protection in her absolute abomination of a hacked-together protective helmet!

It started off as a football helmet, and kept going from there, mostly.

Still, thinking about her gear doesn't help any.  It's not like she's MacGuyver.  She has to work with what she has, which is almost tautology, really - but that's also irrelevant.

Where's the booming coming from?

The basement. Which is not a good sign! Nothing good happens when people take the magic into basements. It means they're trying to bend the rules. 

Oh, great.  At least that means she can bend the rules right back.  Probably.  Maybe.

She'd better hurry up, regardless.

If nothing else, dragging the horrible magic stuff back the the surface usually gets it back to normal. Usually. 

There is an unfinished mundane basement, which is bad enough, and seems to have been used as an improvised workshop by whoever is down here; there are some plastic containers full of reagents and piles of paper that appear to be photocopies of prints of scans of ancient tomes. Then, beyond that, some damn fool seems to have kept digging, creating a rough tunnel that wends its way into the dark, lit by a handful of battery-powered lanterns. The banging continues apace, each blast a little louder than the last. 

A quick riffle; she's no expert in Deep theory, but...Oh, great.  Even if it wasn't shitty copies, this stuff seems generally bad.  Nothing to do but keep delving; she's recording this for later at least, she can get that data off her body cam's memory.

Deep theory is a bit of an oxymoron, and tends to drive those who study it to strange places, both physically and mentally, but at least as many of these books are about arcane magic, which, while given to heterodoxy and edge cases, is at least internally consistent. At least when it's not mixed with The Deep. The meat of it seems to be about the binding and unbinding of spells. 

The tunnel continues down into the dark for an ambiguous amount of time and distance, as tunnels are wont to do, and then, in the next chamber, she hears chanting. Each verse is punctuated by a bang, and then maniacal laughter in two voices, one tinny and hazy, as though it has been put through an extremely low bit-rate compression. 

"Good evening, fellow citizens!  What, may I ask, the fuck?"

Only way out is through.

...Well.  Not literally out.  She could leave if she wanted.  But she doesn't, with this being a thing that's happening.

"Well, you see - " 

"Soon, I will be free!" shouts the tinny voice, which appears to be coming from a sword, sheathed in a case enamelled with fine runes, in the centre of a circle that appears to be drawn in goat-blood. if the exsanguinated goat in one corner of the rough-stone chamber is anything to go by. The swords emits another explosion. 

"I really don't think so."

Time to grab a sword!

The man (a skinny college student type of no real physical skill), will attempt to prevent this, by grabbing the sword first. 

Unfortunately for him, the techniques she knows for getting out of the way of blows work just as well to get in the way of blows (or, in this case, grappling attempts)!

It doesn't take any special techniques to defeat this man in straight-up combat, as out of shape as he is, but it does enlighten him to the fact that Diana is a trained martial artist. He yields with a sign of resignation. 

"To loose all of my hard work to some thug at the last second... I can't believe it.", he mutters to himself. 

"I'm hardly 'some thug'.  Why are you trying to release a plausibly sapient explosion spell?"

"Those fools at the college had me on a three-year research project trying to find uses for a taste-based illusion spell! I was never going to earn the rights to any useful spells that way! Now, I can show them all!" 

"I told him that I'd blow them up if he let me free! But he's not a good enough person to let the binding off properly." Says the sword. It punctuates this sentence with a bone-rattling burst of concussive force, presumably in an attempt to make Diana let go of it. 

"...you know, there are ways to get personal power that aren't this bloody stupid.  Go join a damn supernatural arts dojo.  Maybe it'll knock the megalomania out of you, even."

Diana drops the sword, then catches the sword, then ties it to her belt.  "-- Nice try, buddy, but still no."

"Says you, not everyone is some talented young master." 

"Talent.  Talent is a filthy lie.  I worked for this.  You worked for this, and you worked quite hard!  Perhaps you could turn that fervor on something that does not end in uncontrolled explosions everywhere?  Something to think about, I'd say.  I'll be going now."

And she starts walking out.

The sword explodes again! This time, causing a section of the unsupported stone wall to collapse. 

"...oh, for -"

And then a monster comes out of the wall! It resembles a millipede in ways, except it has mole's claws instead of insect-feet, and they're arranged around its body in a spiral running down it's length instead of in two regular rows. And it has a grasping, gaping maw surrounded by a circle of chelicerae-like fangs. It surges towards the man on the ground, perhaps sensing easy prey, and he screams. 

"No."

And in another space-bending step, Diana stands between the mole thing and its prey, space twisting as she brushes it aside and also electrocutes it with the tasers in her gloves!