What's the deal with the final boss?

[Not John Malkovich]

Try #1
Got the 1st form down to about 1/2 life, it disappeared and then never returned. No attacks, no nothing. After waiting ~2 minutes I restarted. At least there's a save right outside...

Try #2
Wipe 1st form, this time it doesn't glitch out and I fight 2nd form. Nearly kill it, but end up taking lethal from some invisible attack. Yay.

Try #3
I stomped the 1st and 2nd form without breaking a sweat but i'm puzzled what you're supposed to be doing with God-Holborn . None of the enemy pieces seem to have a hurtbox. The tentacles don't seem to attack but the main enemy does some beam attack that pops me into freeze effect and that's that.

So dumb glitches aside what's the actual game plan? Are the 3 tentacles supposed to be vulnerable to attack? Something else?

[nu1x]

Never got around to beating the 2nd form cos I'm playing on highest difficulty. If there's third boss then ♥♥♥♥ that. Or I need to max all upgrades.

[red255]

theres a skill that you use that uses constant MP for spin damage, the spin attack I think its called tornado spin, if you have a slow weapon you spin slower and use less MP per spin so you can spin for longer which is invincibility frames.

which you can chug potions of mana. not sure the math here, but a big damage slow weapon and the tornado spin is your best bet to most things once you have it. and lots of potions.

[nu1x]

Nice. I already found out about the usefulness of tornado spin, will try slow weapon.
It's great finding about these mechanical abuses in games you like.

[Not John Malkovich]

For the record, the bugs went away on the next attempt at the final boss.
Gameplan is:
Hack away at 1st form, nothing hard here.
Hack away at 2nd form, just stay out of the black mist.
Hack away at the tentacles, then hack away at {Final Boss}.