Persona 3 Reload - Tartarus Block 2 (2nd Half) | Part 16
1For this recording, I had the power go out after I'd gone through most of this block of Tartarus. So I was only able to record the border boss and the Monad door bosses.
I think you'd have missed the Monad Door explanation, but basically they're new additions to Reload. Doors can randomly appear on floors that contain a boss (3 per Tartarus block). At the end just before border floors, there's a permanent Monad Door that has unique bosses. Or as unique as bosses get in this. Most of them are just gimmick fights that you'll either steam roll through or get walled on if you just happened to walk into them with the wrong set up. Like one in particular that has enemies spamming instant death spells with absurdly high HP so fighting them normally is a recipe for disaster, so you need to go into the fight with instant death spells of your own to turn what would be an agonizingly long fight into a 2 turn win. Or get fucked if you don't happen to have any instant death spells at the time.
They also give weapon crafting materials for defeating them, which is the main incentive to do the random Monad Doors when they show up. The fixed ones will give you gear, outfits, and more Tarot cards.