Being friends with the literal princess of Candy Kingdom, AKA Princess Bubblegum would be expected to be good, which, it is, really, though it also has some downsides, by downsides, I mean going to war with her... though with thousands of Banana Guards, Finn, Marceline, and Lumpy... barely makes it any better, but that still counts as better. Anyway, the war will be against Gumbald and his army, Gumbald being Princess Bubbegum's brother, you don't exactly know how this war came to, but like, you don't want to disappoint Bubblegum...

A bit of a time-skip to well, the war, y'know. You, Bubblegum, Finn, and Marceline at the front with thousands of Banana Guards behind you... and I guess Lumpy and Lemongrab, too, but, y'know. While on the other end of the battle-field, is Gumbald and his... cake-looking dudes, yeah. After a lot of shouting and stuff, right before Bubblegum is about to blow the war-horn, Finn convinces Bubblegum to give one last chance to Gumbald to make peace... whichhhh, leads to a very anti-climatic peace-before-war thing, and cliche words from Bubblegum, the words being...

Bubbleball: "Two candy-kingdoms unite!"

And it's finished off with cliche cheering from everyone, which is cut off by some portal opening in the sky, and the flaming candy-king (I think that's his name? I Haven't watched the show in five years...) falling out of the sky, in flames, he falls onto the ground in front of you all, before looking up.

Candy King: "Yeah, we might have fluffed-up."

And just like that, the gigantic, fleshy, red GOLB lowers out of the portal, as the clouds above swish and turn, and for some reason, Marceline thinks this is Bubblegum's fault, as she flies up to her.

Marceline: "What did you do?!"

Bubblegum: "I didn't do anything!"

They're cut off as GOLB blasts a beam at Gumbald's army, causing them to melt and form together to make a massive, grotesque hound-creature made of their melted bodies mound together, which begins destroying everything in it's way. Do whatever.