Fionn Mac Cumhaill is the second boss of the Shinagawa Netherworld. Based on the mythical Irish hero of the same name, he is a hunter of Demons, and you just so happen to cross his path.
Wielding the legendary Mac an Luin, Fionn Mac Cumhaill is a potent physical force with enough magical abilities to keep you on your toes. As with all bosses in Shin Megami Tensei 5, if you don’t go into the fight prepared, you will likely suffer a crushing defeat.
Fionn Mac Cumhaill Potentials, Attacks, and Resistances
Potentials
Fionn Mac Cumhaill is primarily a physical brawler, and this is represented by his shockingly high +5 Potential with Physical attacks. This is a serious boost to his already-impressive damage output.
Not only that, however, Fionn Mac Cumhaill is a fairly potent caster, with a +3 to Ice magic and +4 to Fire magic. He is no pushover on the offence.
Attacks
When it comes to attacks, Fionn Mac Cumhaill has four standard attacks, one buff, and an attack he will only use during his Magatsuhi, Omagtoki: Critical.
|
Attack |
Explanation |
|---|---|
|
Mac an Luin +5 |
This is Fionn Mac Cumhaill’s most powerful attack, and he doesn’t even need to use Magatsuhi to end the life of one of your demons. It deals severe Physical damage to one target, and if he lands a critical hit, it deals bonus damage. You don’t want a squishy demon targeted by this attack — it’s simply devastating. |
|
Dark Sword +5 |
Whilst nowhere near as powerful as Mac an Luin +5, Dark Sword +5 is far from weak. Dealing 2 medium damage Physical attacks, it can chunk most demons with ease. The kicker, however, is the Seal ailment it inflicts on its target. This prevents that demon from using skills. This can seriously hinder your offence. |
|
Pierce Armour +5 |
This is Fionn Mac Cumhaill’s weakest attack, dealing only one weak Physical attack to one target. The trade-off, however, is that the attack lowers the target’s defence for three turns. This makes all of his other attacks way more dangerous. |
|
Bufula +3 |
Bufula +3 is only here to restrict which demons you take into the fight. It’s a single target attack, and it deals medium Ice damage. When compared to most of his other attacks, it’s not a big deal. Still, avoid demons weak to Ice. |
|
Tarukaja |
Tarukaja is a buff Fionn Mac Cumhaill will cast on himself to raise his attack stat. This, in conjunction with his monstrously damaging Mac an Luin +5, or Pierce Armour +5, can result in one-hit kills on most demons. |
|
Maragion +4 |
Fionn Mac Cumhaill will only use this attack during his Magatsuhi. This is his only AOE attack, and it deals medium Fire damage to the whole party. Because Fionn Mac Cumhaill has a decent Potential with the element and a very high magic stat, this can be devastating if it hits. Because it’s highly telegraphed, however, you can counter it quite easily. |
Resistances
Fionn Mac Cumhaill comes with complete immunity to Light and Fire damage. This is especially notable since both those elements have been useful in the zones leading up to his boss fight. His only weakness is Lightning and you will want to focus on this heavilyy during the fight.
Preparing For Battle
Items
You want to pick up some Fire Dampers. These are very cheap at only 150 Macca each, and will completely negate Fionn Mac Cumhaill’s Magatsuhi turn. This is pretty huge. If you are low on Chakra Drops, these can be pretty handy in this fight too.
Essence Fusion
Like with Loup-Garou, you want to make sure Nahobino isn’t going to get one-shot by overwhelming physical damage. Both Oni and Shiki-Ouji Essence can be used to gain Resistance to Physical, and this alone will keep Nahobino out of trouble.
Battle Strategy
Provided you are prepared for the fight and have a decent set of demons on you, this fight should be pretty straightforward. Cironnup should be casting Cautious Cheer to keep your team buffed, or Blinding Strike to debuff. Shiki-Ouji should be using Taunt, with Zio/Zionga being a backup once Taunt is up.
Your damage comes from Nahobino and Lilim, however. Ruinous Thunder and Zionga should deal decent chunks of damage. You could also use Thunder Gems if you have them, if Mana is a concern.
Whenever Fionn Mac Cumhaill enters Magatsuhi, use Fire Dampers and get back to hitting him. Make sure you have some decent substitutions on standby in case Fionn Mac Cumhaill gets lucky and kills one of your demons with Mac an Luin +5.
Once you get the rhythm down, Fionn Mac Cumhaill should fall shortly after, allowing you to trundle into the next area.
