You wouldn't imagine a citizen of Bandle City being alone, Yordles being such social creatures after all. But with Veigar, he's just a whole 'nother story. His pitch-black fur alone was more than enough to set him apart from others of his species, especially considering many Yordles have much more colorful and vibrant fur. But the icing on the cake, however, was his perpetual desire to bring chaos and malevolence everywhere he traveled. Whether it be the emptiness of a desert or the rustle and bustle of a populated city-state, his evil desires were all the same. 
In this case, it would be a forest, which might at first glance be empty, but was actually busy with all sorts of biology, mostly much smaller creatures competing for survival. Veigar wouldn't have any trouble making his way through here. Even a harmless insect like a gnat, or a stinging predator like a hornet, the dark-furred Yordle would not care, he would destroy them on the spot if they got too close to him. With Veigar around, he didn't even have a competition on whether or not he survives; he is absolutely confident that he is the most powerful, evil being for a range of countless miles. 
Sometimes though, the most dangerous adversaries are ones that aren't even alive. Despite Veigar being fully aware of this, he always thought just meant like the trees and plants, which might have toxic barbs of some kind or whatever. You know, just stuff that doesn't move, and thus isn't "alive". But this mistake would be Veigar's downfall. Roving through the forest without much of a goal other than to leave his mark of calamity, he just glanced left and right, not seeing a single living soul out here. Maybe another day he would do a one-man invasion of a small village just to satisfy his appetite, or perhaps he would go about destruction in a more obscure way, by throwing together a coup and politically destroying a large civilization from the inside-out. 
But today, he wanted to take a break from being around others, traveling alone and having nobody to worry about. He would soon learn though that traveling in a group is probably a safer and more effective way of navigating rarely-traveled land, especially in a desolate forest such as this one. The terrain got more boggy as Veigar wandered further into the woodland's epicenter, and he just naturally assumed it would be a little damp here because the trees are so tall and leafy that sun never gets here to dry up the rain that falls to the ground. And while that is true, it's a lot more risky to continue than he'd like to believe.
The next several steps he took, they were all full of determination; despite the ground getting more boggy, he was sure that it would become solid dirt again and he could continue on his journey for something slightly more interesting to destroy than a bunch of bugs and trees. He was far from being right though, as he ventured further, the ground only became more of a liquid, and he had sunk to his ankles in the earth. It was a struggle now for him to lift his feet up, and whenever he finally managed it, he nearly lost his balance and had to plant that foot right back down, falling into the quicksand with a noisy *plop* as the wet sand splashed around. He muttered a few curses under his breath, both of the unpleasant words kind and the literal bad luck kind, waving his staff and trying to cast some sort of spell that might help him in a situation like this. But him being the evil creature that he is, there isn't a single spell available to him that's actually designed to /help/ somebody in peril. 
Being evil didn't mean he was dumb, though. He quickly realized that there was nothing he could do for himself, and nothing within reach to grab onto. So knowing this, he called out for help, "If anyone's out here, I'd really appreciate it if you headed over this way, I'm really in need of some assistance!" He wasn't particularly used to asking for help from others, so he was really awkward in doing so. All he knew was that it was the best he could do, and he still worded it in a way that if there really was somebody out here, they would come to his rescue. But seeing nor hearing any sign of help after a few seconds, he was about to call out again, especially because of how quickly this strangely active pit of quicksand is swallowing him up, gurgling as it flowed up along his thighs, climbing up onto those strands of fur and seeping into it. It was basically attaching itself directly to his body, and his situation wasn't getting any better because of how his body was reacting to it. The strange sensations of this thick quicksand gulping him down, especially now that it was all around his midsection, his sex drive started to kick in at the most inopportune time. The quicksand seemed like it was climbing up on his currently soft dick,  gulping on it like it was doing to the rest of his body. But as his cock grew hard, it momentarily escaped the grasp of the quicksand until he sank down further. The downside though, he was fully exposed, naked for anyone to see. He was actually hoping at this point nobody would come to help him, lest he die of embarrassment.
And at that very moment, a rustle comes from one of the many shrubs nearby, and out comes a creature of his same species: a Yordle. He had white fur and a halo, much more pure-looking than Veigar. As the dark Yordle got a good look at this, thoughts ran through his head such as 'You have /got/ to be joking', and 'Am I dreaming right now?'. Moon, the white Yordle, edged closer to where he heard that call for help, finally seeing who it was that was yelling out for assistance, but also seeing something unexpected at the same time. Veigar immediately tried covering himself up, frustrated with how this quicksand made him at his peak of sexual excitement right as somebody finally came to help him. He thought he was doing a good job at hiding it, especially because of everything being dark and helping to camouflage his cock. But Moon knew what he saw, and he decided to have a little fun with this, but getting closer and acting like he was going to help. Veigar didn't know how to feel about all this, but he was at least glad that he had a chance to survive. The white Yordle approached him, asking, "Need any help?"
The sinking Yordle nodded, trying not to put off his helper by displaying too much of his evil, but instead acting modest and shy. You'd expect him to reach out his hand, but he was still trying to cover up his oversized shaft, and he wasn't quite willing to expose himself like that. The way that the quicksand was pushing up on his fur was sexually exciting enough for him, but what was driving him crazy was the way that the quicksand was doing the same to his cock, engulfing it completely to the tip, at the cost of his body being sucked in nearly chest-deep into the quicksand. At this point, he reached his arm out slowly.
Moon had a hard time reaching out far enough at this point, as Veigar waited for far too long to grab the other Yordle's paw. "You waited too long," Moon said, still doing his best to help regardless. The Yordle in peril did what little movement he could in this situation, and he began to attempt 'swimming' out of the quicksand. His arms paddled through the goopy pit of quicksand, not really accomplishing too much, but he felt like he was getting closer to the white-furred Yordle. Veigar was being a little louder than he desired as well, since that quicksand was splashing and glooping loudly every time he paddled with his hands. Due to all this struggling though, Veigar only suck deeper into the quicksand, far enough down that the short distance he traveled closer to his potential savior was completely nullified. 
Up to his chin now, Veigar knew he was in genuine danger. He started getting desperate. "Help me out of here," he exclaimed, "At least give me something to grab on to!" Moon hesitantly looked at this fellow Yordle before glancing around and doing a brief search. There wasn't much out here that would get the job done. He got up, started walking around, examining the ground for something to get Veigar out of there, but all the while, Moon stayed oddly calm. "This quicksand isn't slowing dowgnghf-..." Veigar said quickly before his mouth was covered by the quicksand. He could hardly speak anymore, and all that came out of his mouth at this point was a garbled mess of what probably couldn't even be considered words. Moon eventually found a sturdy-looking branch that had fallen from a tree nearby, but by the time he returned to Veigar with it, the Yordle sinking in the quicksand was long gone. Well, except for that signature hat of his. 
From Veigar's perspective, his view of the world was slowly regressing to just a few inches off the ground, and things started to get blurry as he was forced to close his eyes before quicksand overtook him. And as his vision faded into darkness and he could no longer breathe, he tried holding his breath for as long as he could, before mustering up all the remaining strength in his body to lift himself back up. To do so, he grabbed onto his hat, it possessing enough buoyancy to allow him to come to the surface once more. His hat was submerged by now, but that was the least of his worries. With all that quicksand around his face, he could hardly see, but he could still speak without seeming so jumbled up anymore. "Please tell me you found something, I'm going to reach out for it, I can't see too well..." Veigar mumbled, blindly reaching out with his arms in search of something to grab onto. Moon did indeed find a branch, but that was really just a way of comforting the sinking Yordle while he was consumed by the quicksand the first time. 
The second time around, Veigar still had some hope, but not as much of a chance of escape as before. He desperately searched for something, anything, to grab onto, but everything within arm's reach was just more quicksand. And everytime he hit it, it made the quicksand splash about loudly, glooping as it just bubbled up around him and kept sucking him down. Since his head was covered in quicksand rather than his dark fur, it was hard to tell in his last moments whether that little dent poking upward at the top was quicksand or it was still Veigar's head. The hat was submerged now since he used it to pull himself back up, so once he went down, there wasn't a trace. And as he went down, that quicksand was still pushing up on his fur all over his body, lifting up all those furry strands, but contrarily pulling him down at the same time. Now that he was gone, lacking the strength or support needed to pull himself out, he wasn't able to come up a third time. And all this time, Moon just watched, holding that branch by his side and witnessing this evil Yordle sink to his demise, observing as those last few seconds passed, a dent forming downward at where Veigar sank, then soon filling in with the quicksand around it. And when it filled in, he could see bubbles rising to the top, making audible *pop*'s after lingering at the surface for a few seconds. And shortly after those bubbles ended, the very last event in the sequence was something poking slowly out: Veigar's hat, which floated back to the top, being the very last thing left of him. Veigar himself, however... he was long gone. With how evil he was, and how confident he was that he could defeat any foe, it really makes you wonder what his last thoughts were when that last breath was taken from him from within that liquidy quicksand under the surface of the earth.