How to Beat Fionn mac Cumhaill

Fionn mac Cumhaill is a boss in Shin Megami Tensei V: Vengeance (SMT V). Read on to know the best strategies to use against Fionn mac Cumhaill, Fionn mac Cumhaill's weaknesses, best demons to use against Fionn mac Cumhaill, and the best buffs to use to counter Fionn mac Cumhaill, and the most effective strategies to use to beat Fionn mac Cumhaill!

Fionn mac Cumhaill Stats and Weaknesses

Recommended Level

Recommended Level	Location	Drops
32	Mitatebashi	None

Fionn mac Cumhaill Stats

Fionn mac Cumhaill's Weaknesses and Resistances

Elemental Weaknesses and Resistances

Status Ailments Resistances

Fionn mac Cumhaill's Skill Proficiencies

Elemental

Other

Fionn mac Cumhaill's Skills

Best Demons to Use Against Fionn mac Cumhaill

Demons with Electric attacks

For the main damage dealers, we recommend Mothman and Lilim as they can target Fionn's weakness to Electric.

Cironnup as support

Cironnup resists 2 out of Fionn's 3 Magic attacks. It can also use Cautious Cheer to boost the team's stats and Blinding Strike to lower Fionn's Accuracy and Evasion.

How to Beat Fionn mac Cumhaill

Weak to Electric Bring Fire Dampeners Lower his accuracy Fuse Oni's affinity to Nahobino

Weak to Electric

Fionn's only weakness is Electric so bring your best Zio spammers and give Nahobino strong Electric skills to gain additional turns during the fight.

Fuse Aogami Type-4's essence to Nahobino

Zoomed In Map	Zoomed Out Map

You can also get Ruinous Thunder for Nahobino from Aogami Type-4's essence to make him one of your attackers in this boss fight. You can get the essence from the treasure box on the east side of the highway before the leyline fount of Konan 3rd Block.

Bring Elec Gems

If you lack strong Electric skills, you can use Elec Gems instead to deal heavy Electric damage to Fionn.

Bring Fire Dampeners

When he starts gathering Magatsuhi, use a Fire Dampener to protect your team against Maragion.

Lower His Accuracy

Fionn has high skill proficiency on Physical attacks, allowing him to deal a lot of damage using skills with this affinity. Lower his Accuracy using Cironnup's Blinding Strike to increase the chances of him missing his attacks and ending his turn early.

Fuse Oni's Affinity to Nahobino

Fionn uses a lot of Physical attacks that you need to watch out for especially Mac an Luin. Give Nahobino resistance to Physical attacks by using an Oni's essence to boost his survivability.

Shin Megami Tensei Related Guides

Boss Battle Guides | List of Bosses

All Boss Types

Related Boss Guides
Story Bosses	Optional Bosses
DLC Bosses	Superbosses

SMTV: Vengeance Story Bosses

SMTV: Vengeance Story Boss Guides
Glasya-Labolas	Naamah
Eisheth	Yuzuru and Hayataro
Agrat	Beelzebub
The Four Qadistu	Zeus and Odin
Abdiel and Ichiro	Tiamat
Tehom

Story Bosses

Story Boss Guides
Hydra	Eligor
Nuwa	Lahmu (1st Fight)
Loup-garou	Fionn mac Cumhaill
Lahmu (2nd Fight)	Shohei Yakumo
Surt	Ishtar
Chernobog	Arioch
Abdiel	Odin
Zeus	Vasuki
Metatron	Tsukuyomi
Nuwa	Abdiel
Lucifer	Lucifer (Secret Ending)

Optional Bosses

Optional Boss Guides
Pazuzu	Anahita
King Frost	Thunderbird
Loki	Belphegor
Moloch	Amanozako
Camael	Abaddon
Arahabaki	Khonsu
Fionn mac Cumhaill (2nd Fight)	Baal
Huang Long	Asura and Mithras
Amon	Gabriel, Raphael, and Uriel
Belial	Michael
Inanna	Danu
Maria	Khonsu Ra
Zeus (2nd Fight)	Marici

Optional Mini-Bosses

Optional Boss Guides
Apsaras	Leanan Sidhe
Shiki-Ouji	Xuanwu
Jatayu	Kumbhanda
Quetzalcoatl	Baihu
The Kunitsukami	Futsunushi
Adramelech	Zaou-Gongen

Punishing Foes

Punishing Foes Guides
Oyamatsumi	Horus
Girimekhala	Hecatoncheires
Chimera	Seth
Bishamonten	Jikokuten
Koumokuten	Zouchouten
Garuda

DLC Bosses

DLC Boss Guides
Artemis	Cleopatra
Mephisto	Matador
Daisoujou	Hell Biker
White Rider	Red Rider
Black Rider	Pale Rider
Mother Harlot	Trumpeter

Superboss Optional Bosses

Vengeance Optional Boss Guides
Shiva	Demi-Fiend
Masakado	Satan