How to defeat Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance

Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance is a boss that you might come across while exploring Konan 2nd Block of Shinagawa. When you attempt to cross the bridge from Mitatebashi, this boss will confront you. Fionn is one of the primary story bosses for the Canon of Creation as well as the Canon of Vengeance. Players will need to defeat him to progress in the story of Shin Megami Tensei 5 Vengeance.

The Shinagawa Netherworld's second boss is Fionn mac Cumhaill and he happens to be a demon hunter, who is based on the legendary Irish hero of the same name. Fionn mac Cumhaill, the famous wielder of the Mac an Luin, is a formidable fighter with a wide range of magical skills that will keep you on your toes.

In this article, we take a look at how you can defeat this legendary monster hunter in Shin Megami Tensei 5 Vengeance.

Stats and Weaknesses of Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance

Stats of Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance (Image via Atlus)

Fionn mac Cumhaill is a formidable foe who has the following weaknesses and stats:

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

Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance has the following skillset with the effects mentioned below:

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

Some additional stats of Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance:

Agility	25
Luck	23
Magic	36
Strength	36
Vitality	25

Recommended Tactics for Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance

Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance is inspired by a hero of Irish Mythology (Image via Atlus)

Some of the recommended demons in SMT5 Vengeance to use against the Fionn mac Cumhaill boss fight are:

Cironnup
Lilim
Mothman
Jatayu
Anahita
Setanta
Principality

We suggest Mothman and Lilim as the primary damage providers since they can take advantage of Fionn's vulnerability to the Electric element. Two of Fionn's three magic assaults are repelled by Cironnup.

Additionally, it can employ Blinding Strike to reduce Fionn's Accuracy and Evasion and Cautious Cheer to increase the team's stats.

Physical Resistance and Fire Dampeners

You should get some fire dampeners. At just 150 Macca per, these are incredibly affordable and will counteract Fionn's Magatsuhi turn. This is quite significant. In this battle with Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance, Chakra Drops might also come in rather handy if you are low on them.

You want to make sure that Nahobino won't be one-shot by a barrage of physical damage, just like with Loup-Garou. Nahobino can obtain Resistance to Physical Element by using either Oni or Shiki-Ouji Essence, and this will be sufficient to keep him out of trouble.

Fighting the Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance

Nahobino going against Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance (Image via Atlus)

1) Utilizing Fire Dampeners against Magatsuhi

After charging Magatsuhi, Fionn can one-shot your entire party if you're not careful. Thus, to stop his assaults during Omagatoki: Critical and waste his press turns, keep both Fire and Physical dampers handy. Gustave will sell Fire Dampeners and Physical Dampeners that you can buy with Macca.

Gamers can also obtain them by engaging with Quest Navigator locations of interest, defeating adversaries, or opening treasure boxes. Use a Fire Dampener instead of a Physical Dampener if you don't have any, and then your party is on guard. This will be the only way to get through his Omagatoki: Critical which will otherwise prove to be lethal.

2) Focus Debuffing

Using demons with a high -kaja and -nda skill set is an excellent method to make the fight against Fionn mac Cumhaill in Shin Megami Tensei 5 Vengeance much simpler. Fionn's ATK will rise when he uses Tarukaja. He will find it simpler to one-shot the Nahobino with Mac and Luin the more damage he deals.

Therefore, the plan is to have a demon with Tarunda to lessen his ATK, and a demon with Sukunda and Sukukaja to hinder his ability to hit you. Fionn's press turns will burn through if he misses his attacks.

3) Utilizing Electric demons and Oni's affinity for Nahobino

Since Fionn is susceptible to Elec talents, you will need to have demons with Zionga and strong Elec affinity if you want to consistently give him damage. A point to note is that you will need to use your press turns to continue hurting Fionn's high HP so that you may consistently deal damage to him during your turn.

You can use the Nahobino and Stanta to deal physical damage. Once Omagatoki: Critical is activated, they will be able to significantly reduce Fionn's HP. You will have Yoko with Zionga for Canon of Vengeance, who can assist in extending your press turns. It would be best to be cautious when dealing with Fionn's physical strikes, particularly those of Mac an Luin. By utilizing Oni's essence to increase his survivability, you can give Nahobino resistance against physical strikes.

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