I'm so glad someone managed to make a front page Adventure Time submission. It's probably the most popular cartoon online next to MLP. There should be a crossover. I loved the animation in this. It makes you wonder why Jake doesn't stretch his body to be like Lady Rainicorn. I imagine they have to be the same size to have, uh, you know.
I should have known it would be the Ice King. I love Finn's face at the end. Glad he didn't become part of it. It was sad to see Lady Rainicorn like that. Glad everything worked out, sorta. It does fit in with the bizarre nature of the show.