Shin Megami Tensei V (SMT 5)

How to Beat Fionn mac Cumhaill

Shin Megami Tensei V Walkthrough Team

Last updated on: December 21, 2021 01:11 AM

★ All Miman Locations
☆ Best Miracles Tier List
★ Best Demons to Use
☆ Best Nahobino Builds
★ Endings Guide

SMT V How to Beat Fionn mac Cumhaill.jpg

Fionn mac Cumhaill is a boss in Shin Megami Tensei V (SMT 5). 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 Guides
Boss Guide (1st Fight)	Boss Guide (2nd Fight)	Stats and Fusion Guide

List of Contents

Fionn mac Cumhaill Stats and Weaknesses
How to Beat Fionn mac Cumhaill
Shin Megami Tensei Related Guides

Fionn mac Cumhaill Stats and Weaknesses

Recommended Level

Recommended Level	Location	Drops

32	Mitatebashi	None

Fionn mac Cumhaill Stats

Strength	36
Vitality	25
Magic	36
Agility	25
Luck	23

Fionn mac Cumhaill's Weaknesses and Resistances

Elemental Weaknesses and Resistances

Physical	Fire	Ice	Electric	Force	Light	Dark
-	Resist	-	Weak	-	Resist	-

Status Ailments Resistances

Sleep	Confuse	Charm	Mirage	Seal	Poison
Null	Resist	Resist	Resist	Null	Resist

Fionn mac Cumhaill's Skill Proficiencies

Elemental

Physical	Fire	Ice	Electric	Force	Light	Dark
+5	+4	+3	-6	-	-	-

Other

Almighty	Status Ailment	Recovery	Support
-	-	-	-

Fionn mac Cumhaill's Skills

Skill	Description
Mac an Luin +5	Unique Skill: Severe Physical attack to 1 foe. Greater effect if a Critical hit.
Dark Sword +5	2 medium attacks to 1 foe. Chance of inflicting Seal.
Pierce Armor +5	Weak Physical attack to 1 foe. Lowers target's Defense by 1 rank for 3 turns.
Bufula +3	Medium Ice attack to 1 foe.
Maragion +4	Medium Fire attack to all foes. Only used as a Magatsuhi Attack.
Tarukaja	Raises Attack of 1 ally by 1 rank for 3 turns.
Omagatoki: Critical	Magatsuhi Skill: All attacks, including magical attacks, will become Critical hits for all allies for 1 turn.

Best Demons to Use Against Fionn mac Cumhaill

Mothman

Lilim

Cironnup

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

SMT V Cautious Cheer.jpg

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

SMT V Weak to Electric.jpg

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

SMT V Blocked Maragion.jpg

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

Lower His Accuracy

SMT V Blinding Strike.jpg

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 Partial
Boss Battle Guides | List of Bosses

All Boss Types

Related Boss Guides
Story Bosses	Optional Bosses
DLC Bosses

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)	Shiva

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
Demi-Fiend

Comment

4 Anonymousover 2 years

Thanks king, Imma do that rn. Only hitting like 78 with moth man 😑

3 Anonymousover 2 years

Just lost this fight on the turn I could have killed him because your bullshit guide says he resists fire when he, in fact, blocks it.

See more comments (8 Comments)

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