KH Birth By Sleep Final Mix (PS4) - Mysterious Figure (LV1 Critical/Ventus)
3Before you say anything, never will I ever in my life, afterlife or any alternative you believe in EVER do this dumpster fire of a boss without Zero EXP. Mysterious Figure is by far the absolute worst and most poorly designed fight I have ever seen in my whole life.
One HUGE thing I need to address first is your commands. Equip exactly 4 Cures and 4 Surges alternating so you can always get to either easy. It should be noted that what Cure you use doesn't matter, I've seen a lot claiming that Curaga is worse because of it having a longer recharge and that is not true. In BBS all Cure spells are the same speed, it's only in ReCoded and DDD where Cure gets slower the stronger it is. You also want to avoid using any movement command that can deal damage. Thunder Roll, Ice Slide and Fire Glide should never be used because it changes how MF fights and makes him significantly more aggressive with Doom, also Thunder Roll is trash.
How do I even go about describing how to beat this boss? With Ven and Aqua, you can abuse their 100% invincible dodge and attack with Thunder Surge when he is open, preferably when his does his X-Slash. Most of the time if you Thunder Surge him during an attack, it will cause him to use the same attack again so be careful when you attack. If he uses the clone, just run and wait for it to fade. Normally Thunder Surge can kill the clones but on Lv1 you can't so you have to wait it out. The big thing to be careful of is Doom, every time you get hit by it the counter starts 1 count lower and if you get hit by it 3 times your dead.
Once he is down to 2 and a half bars he enters his second phase. In his second phase he will repeatedly use Vanish to make himself invisible, spam Mega Flare and Meteor to no end and he retains normal movement during his Raging Storm attack. While in this phase, I tap the right stick every time I roll to keep the camera on him at all times so I can see when his does the X-Slash.