I had a medium-length LD this morning.
Before I became lucid, I was fighting Loki from Thor/The Avengers. In order to defeat him, I had to become a vampire and learn a way of biting him that would destroy him. I definitely think that counts as learning a dark power. Here’s a brief breakdown of it. I think it also counts as taking a DC’s power, but I’ll let Thorn be the judge of that. Also, used a Portal.
When I became lucid, I flew between skyscrapers. Ironically, trying to remember the millions of tasks available made me wake up XD.
[spoiler][ND]Loki had taken over a building of some kind that a magic society was in charge of. The problem was that he could easily wipe any of them out (appearing to have some kind of extra magic besides trickery), but because he held a staff he was their leader by default.
Because I wasn’t a part of the society, I could oppose him. Unfortunately, he was invincible to most attacks. The only way we could stop him was if I had some kind of super natural powers. It seems he was actually weak to magic, but because he controlled the society, he was safe.
A vampire offered to turn me into a vampire as well. I didn’t care too much either way as I figured I could control the power. He sort of transferred his energy into me and I was a vampire. Biggest difference was that I had sharper teeth overall, not just two big ones. I also was more sensitive to sound.
I used a portal to reach Loki’s location. After a quick fight in which he was too confident because he didn’t know about my powers, I grabbed him and bit his neck. Rather than suck his blood, it felt more like my bite severed his power source, and that in turn killed him.[/ND]
I briefly woke up but used WILD to get back into the dream. I failed and found myself in the building in the same room where I fought Loki. His body was still there but there was now a flood.[LD]I remembered I was supposed to be dreaming and everything in the room disappeared. I walked out on the balcony and found myself in what looked like New York in the 30s. The alley I was in was devoid of people, but and I was between two very tall buildings.
I jumped out the window and began to hover. Flying felt really good as I haven’t just flown for the fun of it in several LDs. Rather than jump right into the LC, I wanted to just enjoy myself.
I started flying through the alley and realized that it just kept going. Sometimes it would turn at impossibly sharp angles. I wanted to get to the streets but couldn’t seem to find a way out. I started flying faster, wall running whenever the turns got sharper than what I could fly with. At one point I grabbed on to a fire escape and tried to think.
I wanted to do LC tasks, but all I could think of were ones that I had already done. I tried to pull out a map of the dream world but nothing was in my pocket. I tried to remember anything else on the chart, but I woke up trying to visualize the chart.[/LD][/spoiler]
Long story short, if you want me to be evil, I’ll be evil; I’m there to help in whatever fashion. 
Of course, if there’s a detail I’m missing about the dream, tell me. You did get points for talking with an animal.
Many old games would use the same art for the characters regardless of setting, and the setting would be drawn on a scale relative to how interactive it is. Art could not be resized on most old game consoles without having a separate, scaled copy in the game. This means that when characters in older RPGs are in towns, they appear to be at the right scale, but when the action zooms out to show characters traversing a large, empty expanse outside of a town, the characters appear to be colossi. While it’s just a visual quirk in old games, we’ll play with it as if it’s an intended behavior. 
Never mind that I totally took my convention from somewhere else!
