Quote Originally Posted by KageTokage View Post
I'm not sure why the spin exploit even works because you'd think it would be laughably easy to make it so an enemy's AI script progresses regardless of whether it's actually moving/auto-attacking (It seems like they need to be doing one or the other).

But yeah. After failing miserably at a solo GNB attempt on floor 82 due to awful RNG I find this development particularly annoying. Sometimes the game just decides it doesn't want you to have a successful run.
It works due to an oversight on how cleaves & certain tank busters work on old bosses.

When the boss queues up a spin strat susceptible move, they need to rotate to face the player to execute it. While a boss has a mechanic queued up, they're unable to queue up other moves unless they're triggered by certain conditions. Now, old bosses have slower rotating speeds, meaning that if the player circles around them in a very specific way they can outpace the rate or stay equal with the rate the boss spins, meaning the boss can never execute the queued move, and since bosses are programmed to only have one move queued up outside of certain situations where they interrupt it, it leads to spin strat of doom.

So yeah, just an oversight of bosses only able to queue up one ability at a time combined with a slow rotation speed not letting them execute said queued skill. At least that's my understanding of it.

They've fixed it afaik by making modern bosses spin faster, or by making sure the boss doesn't need to be facing the player to execute their tank buster/cleaves.