Diabolus Margo is a boss that can be fought during the Save the Country Quest in Metaphor: Refantazio. Read on to learn how to beat Diabolus Margo, their weaknesses, rewards, as well as the recommended party setup and Archetypes to use against Diabolus Margo.

Diabolus Margo Overview and Rewards

Diabolus Margo Quest and Location

Diabolus Margo Boss
Quest	Level	Location
Save the Country	77	Tyrant's Star

Diabolus Margo Rewards

At the end of a battle, receiving a Spoil slightly reduces the EXP and A-EXP gained. If no Spoil is obtained, you'll receive the regular amount of EXP and A-EXP.

Unlocks Ultimate Weapons After Defeating

Upon defeating the Diabolus Margo and destroying the Melancholia Crystal where it's found, several weapons will be awared to the player.

Note that these weapons are one of the strongest weapons for their respective Archetype lineage and obtaining it will lock you out of the Secret Boss on your current run.

How to Unlock the Secret Boss

Diabolus Margo Weakness and Resistances

All Elemental Weakness, Affinities and Resistances

Recommended Party Setup Against Diabolus Margo

Best Characters to Choose

Character	Explanation
Protagonist	The Prince Archetype allows the Protagonist to use all Synthesis skills from all his party members. Utilize this Archetype's strong Almighty moves to bring Diabolus Margo down.
Hulkenberg	Hulkenberg will serve as support with the Magic Seeker Archetype. She will mainly be used as a buffer with Vitalja and as a means to unlock certain Synthesis skills for Junah and the Protagonist.
Junah	Junah will be your second DPS as the Summoner Archetype. She will use Summon Eagle Lion King until Diabolus Margo switches affinities.
Eupha	Eupha is your debuffer and will keep Diabolus Sabara low on Attack and Defense with Vidyartha.

Recommended Archetypes Against Diabolus Margo

Best Archetypes to Equip

Archetype	Recommended Skills
Prince	・Hero's Proving ・Hero's Cry Synthesis Skills: ・Royal Sword
Magic Seeker	・Vitalja
Summoner	Synthesis Skills: ・Summon Eagle Lion King
Trickster	・Vidyartha

The Prince and the Summoner will be your main sources of damage against Diabolus Margo, since some of Prince's Almighty skills are more effective against Human bosses and the Summoner carries various high-tier summons that can damage Diabolus Margo greatly.

Since Margo changes affinities whenever it prays, it's best to inherit summons from different elements to keep your options open.

The Magic Seeker and the Trickster are your buffers and debuffers, focusing on using Vitalja and Vidyartha to ensure both DPS can output as much damage as possible.

All Archetypes and How to Unlock

How to Beat Diabolus Margo

How to Beat Diabolus Margo
Use Prince's Almighty Skills Pay Attention to Diabolus Margo's Aura Use Synthesis Skills

Use Prince's Almighty Skills

As the Prince has powerful Almighty skills, some that are more deadly against Human bosses, like the Royal Slash skill. Using these skills will bring the fight to a close faster so take advantage of it!

List of All Almighty Skills

Pay Attention to Diabolus Margo's Aura

Like it's Homo counterpart, Diabolus Margo will use Reversal Prayer to change its affinities. The aura behind him will let you know what type he changed into but he will not be weak against the opposite element.

Do not hit Diabolus Margo with the same element aura as it has on currently to avoid losing Turn Icons.

Battle System Explained

Use Synthesis Skills

Synthesis skills will also help you damage Diabolus Margo more at the cost of two turns. We highly recommended using the Prince's Synthesis Skill Royal Sword with the Summoner since this will ensure that it will do more damage against Humans.

List of All Synthesis Skills

Metaphor: ReFantazio Related Guides

List of All Bosses

All Story Bosses

List of Bosses
Homo Gorleo	Captain Klinger	Homo Fulquilo
Undead Grius	Zorba	Homo Avades
Monk Captain Gideaux	Greatworm Homo Butera	Heismay
Homo Jaluzo	Sergeant Xanth	Maintenance Chief Ceiba
Master Sergeant Glechom	Helmsman Cabio and Grand Chief Salva	Glodell
Sea Horror Homo Sabara	Treebeast Alento	Malvirta Drako Eht
Homo Margo	Louis Guiabern	Sogne the Icebound
Homo Gorleo (Second Fight)	Melancholia Zorba	Diabolus Gorleo
Diabolus Avades	Diabolus Butera	Diabolus Jaluzo
Diabolus Sabara	Diabolus Margo	Archdemon Louis Charadrius
More	Destroyer Charadrius

All Optional Bosses

List of Bosses
Fire Dragon Mauna	Grotesque Guptauros	Maneater Manjula
Catherina the Bounty Queen	Goborn King	Demo Man Goddard
Alpha Rockworm Valmo	Kadablich	Roger the Libertarian
Lina the Machinist	Trove Imitec	Fatolich
Kokasados	Orgas	Kokasadors
Homo Pento	Psyocropos	Leogron
Milo the Adonis	Rudolf the Roussainte Lion	Icebeast Chimenzahn
Ziocropos	Ordemos	Mad Sanctor Hyperic
Jin the Charlatan	Serial Killer Vinca	Kokamordos
Bandit Chief Cistus	Homo Sandro	Devourer of Nations
Devourer of Stars	Devourer of Flames	Elegy of the Souls
Redscale Apocalypse Dragon