Homestuck

Prepare for more temporal nonsense. When we last saw Dave he had built the trigger item to give him access to the medium. He had plenty of time before he needed to use it. It was a red egg. But, his sprite was a bird he had impaled with a sword. It took the egg to the top of a radio tower and placed it on a nest of random swords and plush asses. We saw Dave climbing to retrieve it when Rose was trying to contact him. Then we hear from him when talking to John that he had already entered the medium. He needed John's advice on giving his second prototype. This skips anything about how Dave got the egg back.

And now we have this animation sequence. Dave: Accelerate. which seems to skip even beyond his conversation with John into a further point in the future. Dave is in the Land of Heat and Clockwork (LOHAC). This place looks awesome, but like a wildly difficult place to live. It's pretty much an ocean of hot magma with steel beam structures coming out of it. All the steel structures have large rotating cogs.

We see Dave teleport to a cog. And immediately start slaying imps and ogres. He’s dressed in something more formal with a red bowtie. He’s also wielding a broken sword with a very odd looking hilt. He is also summoning a floating mixing board. His fighting style has changed significantly. He appears not only to be accelerating time, but also cloning himself to inflict more damage. Also his sprite is now fully prototyped with both the bird and Lil’ Cal. The Cal Sprite has the laser beam attack we have seen with the others. It also summons a giant plush rump to… uhhh… thrust into enemies.

After the animation we see Dave talking with his sprite. Though it's apparently useless at communicating like Rose's tentacle cat princess. It just laughs and somehow talks in weird emojis. Dave complains about this to Rose on his computer glasses (ironically with the apple logo). He mentions it’s felt like months since he entered the medium. The “time hopping” is messing with his perception.

Rose says the point of this is for him to gather as much data as possible on where they went wrong before “returning”. Apparently they messed up Jade “the witch” is possibly dead and so is John “the heir”. It seems John skipping over the gates to the denizen got him killed. Also meteor possibly took Jade out before she could get in. The trolls also stopped communications at that time. The timeline is completely doomed.But Dave is chill about this as he can fix it. He’s just going to go back stop John, tell Rose how to awaken her dream self, and absolutely not prototype Lil Cal. Rose questions if she will continue to exist if this timeline, but trusts Dave. She doesn't have much of a choice.

So Dave uses his floating mixing board thing to go back to the conversation between himself and John. This is the one where Dave asked Johns for advice on what to prototype his sprite with. But, before John could take off Future doomed Timeline Dave (FDT Dave) shows up in front of “present?” Dave.

FDT Dave tells his past self to not let John fly off in the jetpack. Dave tries to explain to John that his future self just appeared and told him to not let John fly the cool jetpack. This doesn't work, FDT Dave tells Jon that he really is from the future in a separate chat. John doesn't believe this either but agrees not to fly off yet. FDT, satisfied with this, drops off a huge stack of cards to his past. Thes cards contained items: the floating mixing board and his weird sword. He then tosses himself into the Sprite. The Sprite is now a crow with a sword in its gut mixed with FDT Dave.

John apparently decides to fly off anyway. Which may just doom the timeline again.