Megami Tensei Wiki

Extreme Vessel is an optional boss in Persona 4.



Persona 4

Extreme Vessel is found on the last floor of Secret Laboratory and appears after the sixth of October. Defeating it grants a boost to the protagonist's Courage stat and the Algernon weapon for Naoto Shirogane.


When starting the fight, Extreme Vessel will always use Virus Wave. Since it doesn't take much damage from an All-Out Attack, it is advised to avoid doing so. Instead, use Power-Charged physical attacks such as Cruel Attack while it's Downed. This Shadow tends to use buffs (Mind Charge, Power Charge and Rebellion), so it is suggested to use Makarakarn, especially as most of the party members are weak to one magic, and Tetrakarn on the protagonist (as it using a Mind Charged Ma-dyne spell usually results in a one-hit party kill). It won't always use a magic/physical attack after respectively Mind Charge/Power Charge (usually using, for example, Magarudyne two turns after using Mind Charge).


The stats for Extreme Vessel applies for both Persona 4 and Persona 4 Golden.

Arcana Level HP SP
Strength 50
Magic 45
Endurance 35
Agility 56
Luck 10
Chariot 57 4800
Phys Fire Ice Elec Wind Light Dark Almi
Strong* Weak* Weak* Weak* Weak* Block Block Strong*
EXP Yen Normal Drop Rare Drop
15000 1000 - -
List of Skills
Skill Effect
Rampage Deals light Phys damage to all foes 1x to 3x.
Cruel Attack Medium Phys dmg, 1 foe. Bonus damage to foes that are knocked down.
Virus Wave Deals heavy Phys damage to all foes with a chance of Poison.
God's Hand Deals severe Phys damage to 1 foe.
Agidyne Deals heavy Fire damage to 1 foe.
Maragidyne Deals heavy Fire damage to all foes.
Bufudyne Deals heavy Ice damage to 1 foe.
Mabufudyne Deals heavy Ice damage to all foes.
Ziodyne Deals heavy Elec damage to 1 foe.
Maziodyne Deals heavy Elec damage to all foes.
Garudyne Deals heavy Wind damage to 1 foe.
Magarudyne Deals heavy Wind damage to all foes.
Power Charge Next physical attack will be 250% greater in power.
Mind Charge Next magical attack will be 250% greater in power.
Rebellion Increases Critical rate for 3 turns (1 ally).

Storyline Shadow Yosuke - Shadow Chie - Shadow Yukiko - Shadow Kanji - Shadow Rise - Shadow Teddie - Shadow Mitsuo - Shadow Naoto - Kunino-sagiri - Tohru Adachi & Magatsu-Izanagi - Ameno-sagiri - Kusumi-no-Okami * - Izanami - Izanami-no-Okami
Sub Avenger Knight - Daring Gigas - Amorous Snake - Killing Hand - Dominating Machine - World Balance - Chaos Fuzz - Envious Giant - Neo Minotaur - Sleeping Table
Extra Contrarian King - Intolerant Officer - Momentary Child - Escapist Soldier - Extreme Vessel - Lost Okina
Other Margaret - Reaper