"...So, you're saying the exciting, exhilarating, and somewhat thrilling activity..."
In front of a somewhat messy bar counter, William took the redcurrant rum pushed over by the Goblin Bartender, but instead of bringing it to his lips, he turned his head to look at the man in the black robe sitting next to him, "Is to come to a bar in Knockturn Alley for a drink?"
Yes, he originally wasn't planning to go out, after all, that Curse on Dumbledore still hasn't been countered, and after tricking Voldemort to death, his fame in the British Magic Realm reached yet another new height—of course, tricking Voldemort was just a minor part, the crucial thing was capital's marketing.
In the Magic Realm now, William's surrounding merch is just short of a blow-up doll.
But in the end, he was dragged unsuspectingly by Sirius and came to Diagon Alley. He didn't expect the other to act mysteriously for hours, only to don black robes and sneak them into a shady bar for drinks—why a shady bar, of course, because this bar still hasn't installed a television!
Damn, there are still Galleons in London City I haven't earned!
William shot a glare at the wall. In the painting on the wall, the knight "fighting" a Giant Dragon suddenly felt a shiver and then got roasted into a carbon block by Dragon Flame.
"Yeah, what else did you think?"
Sirius pulled a glass of Giggle Whiskey in front of him and downed it in one go. Then, like a hen laying an egg, he began "giggling" non-stop for about half a minute—this is the unique "side effect" of this drink, the best-selling in the America Wizarding World, which Sirius fell in love with ever since tasting it in Los Santos.
"...I thought it was drinking too."
William was silent for a moment, placing his glass aside, "Alright, what do you really want?"
"...How do you know I must have a reason to find you?"
Sirius burped loudly at William, only to have his head pushed to the side by the latter. A bit puzzled, he asked with curiosity, "Can't it be that I just want to connect emotionally with you? You know, I always—"
"Say one more word, and I'll pour a Polyjuice Potion with Snape's hair in your mouth," William said menacingly, lowering his voice, "the kind with three months' worth of unwashed hair."
"...He washes his hair every three months? I thought he never washed in his life!"
Sirius widened his eyes in astonishment, clearly shocked, "And you really have something like that? ...How much? I'll buy it."
"..."
Seeing Sirius's eyes sparkling, William immediately guessed what he wanted to do—so, equally excited, he took out a Kabuda from his pocket and slammed a nearly two-liter bottle on the bar, "Free for you, but if trouble arises, don't rat me out—"
"Willing to serve faithfully!"
Sirius vowed fervently, then the two exchanged a glance, bursting into giggles as if both had just downed another glass of Giggle Whiskey.
"...Alright, on to serious matters, what do you actually want?"
"...Okay, I just want to know, that Tom—he's not really your cousin, is he?"
Sirius nodded solemnly, "Don't lie to me; I'm genuinely curious. I have been observing him for a week. This kid is not right at all. How can an eight-year-old kid learn any basic Charm within half an hour? I spent two days just practicing Lumos—"
"Half an hour?" On hearing this, William stroked his chin.
"Yes, only half an hour!"
"...That's slow."
"..."
"And have you considered that maybe the issue is that you were too clumsy?"
"...Haha."
Sirius took an angry gulp of the newly served drink and then giggled again for another half a minute before finally stopping again, "Fine, clearly you're an exception—I sometimes wonder if you're even human—so, that boy really isn't your cousin, is he? Where did your parents—"
"Are you asking for a beating with words like that?" William squinted his eyes, "Parents on sale? Daring to chatter like this to me?"
"...Bro! I'm truly just curious!"
Sirius also realized his slip of the tongue (maybe?), hurriedly seeking mercy.
"Did Lupin send you to ask?"
"...He sold me out?"
"No, I guessed."
William paused, shook his head, and continued, "But I think you don't really want to know, maybe after I tell you, you'll wish to forget it—"
"No way! Absolutely no way!!"
Sirius pounded his chest, expressing that there's no storm he hasn't weathered; these are all just trivial scenes...
"He's actually Voldemort."
William moved his lips, yet the sound only entered Sirius's ear.
"..."
"..."
After a deathly silence, Sirius connected the dots, blinking his eyes, "Hey, aren't you also skilled in Forgetfulness Spell, right? Does that really have severe side effects?" Clearly, Sirius's prior declarations were all bluster—
This scene, he really hasn't seen before.
"Very severe; it might make you senile—for years?"
William nodded expressionlessly, though with his skill, the aftermath wouldn't be as severe, but when there's a chance to bluff, bluff he shall.
"..."
Sirius looked like he was about to cry, remaining silent for a long time, "Wait, no way; how could it be... he's clearly just an ordinary-looking eight-year-old? You're not fooling me, right?"
"Now he's ordinary-looking again?"
"...A lie?"
"True."
"I don't believe."
"Suit yourself, just keep it to yourself—"
"...How on earth did you manage it?"
After a series of pulling and pushing, Sirius was about eighty percent convinced. He couldn't help but believe with William's face so convincingly honest—because he indeed didn't plan to lie.
So, William gave Sirius a rundown of his plan, like letting Voldemort escape, sending him into Azkaban, possessing Dementors to help him break out, using the Dementors to manage the unruly Death Eaters, ultimately reviving Voldemort, and employing a nesting doll tactic to kill two of his souls—
Finally, returning all escapees to Azkaban, each with a life sentence for good measure.
There's no need to worry about the capacity of Magical Architecture.
"...Aren't you afraid of slip-ups?"
"Not afraid, because I have Plan B."
"What is it?"
"If the Death Eaters' revolt can't be contained, then find Voldemort and kill him until he doesn't dare resurrect—"