>>90126877Alright, I'll give it a shot, but it's not gonna be easy.
Flame Princess dumped Finn because he manipulated her into fighting Ice King because it gave him wet dreams (no, I'm not joking). Finn went though a depressed stage for a while after the break up, but got over it.
Finn lost his demon sword, and got it replaced with a cursed grass sword that became permanently attached to his body.
Ice King temporarily reverted back to Simon after his crown lost its magic, during which time he contacted Betty in the past, who then time traveled to the present day, where she began looking for a way to return Simon to normal.
Turns out Finn's Dad (Martin) was alive. They go to find him in a citadel (prison) in space. In order to get there, they need to commit a cosmic crime. Prismo tells them that killing him would do the trick, but The Lich jumps in and kills Prismo first. Finn and Jake hop through the same portal the Lich is brought through to reach the citadel, where they find Martin. He doesn't believe Finn is his son at first. Martin attempts to escape and as Finn tries to hold on to Martin's escape pad, his grass sword envelops his whole arm as he refuses to let go. Eventually his right arm snaps off, and thanks to some magic, regenerative goop, he is left with just a flower for his right arm. The Lich is turned into a giant baby when Finn uses the goop against him.
Finn gets depressed again following his Dad's disappearance. I don't even know how to explain this, but basically a Bee falls in love with his flower arm, and her love pulls him out of his depression, which 'honeyjaculates' him a new arm. Basically he was able to feel happiness and purpose again thanks to the bee's love, and the remnants of the grass sword still within him formed a new 'Grass Arm' which has a thorn sticking out his right hand. Yeah.
