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

Undead Grius Overview and Rewards

Undead Grius Quest and Location

Undead Grius Boss
Quest	Level	Location
Prologue	11	Grand Trad

Undead Grius 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.

Undead Grius Weakness and Resistances

All Elemental Weakness, Affinities and Resistances

Recommended Party Setup Against Undead Grius

Best Characters to Choose

Character	Explanation
Protagonist	The Protagonist can equip the Seeker Archetype so that it can use the Rider of the Blade Synthesis Skill. Undead Grius is weak against Light, so the Seeker Archetype is recommended for this battle.
Strohl	Strohl can equip the Warrior Archetype to dish out the physical attacks against Undead Grius. You can also try using the Round Slash Synthesis Skill against him.
Hulkenberg	Hulkenberg will be awakening the Knight Archetype, which is ideal for its Knight Proclamation Skill. Undead Grius will mostly be using multi-targeted skills, so drawing its attention to a single target is important.

Recommended Archetypes Against Undead Grius

Best Archetypes to Equip

Archetype	Recommended Skills
Seeker	・Dei ・Rider of the Blade
Knight	・Knight's Proclamation ・Jump Thrust
Warrior	・Diagonal Slash ・Round Slash

The Seeker Archetype has the Rider of the Blade Synthesis Skill, which is recommended to exploit Undead Grius' weakness in battle. You will need the Knight Archetype to perform this Synthesis Skill.

Knight's Proclamation is a recommended skill to have during this boss battle, as Undead Grius tends to use a multi-targeted attack called Phantom Dance. This skill will allow you to be the only target for Undead Grius' attack.

The Knight Archetype is also resistant to Slash attacks, so being the sole target to Undead Grius' attacks while also being resistant to Slash attacks makes the Knight Archetype a solid support for this battle.

The Warrior Archetype can also dish out physical attacks of its own using Diagonal Slash and Round Slash, with the latter being a Synthesis Skill that requires the Knight Archetype.

All Archetypes and Jobs

How to Beat Undead Grius

How to Beat Undead Grius
Use Rider of the Blade Synthesis Skill Use Knight's Proclamation Equip Knight Archetype to Resist Slash Attacks Experiment with Synthesis Skills

Use Rider of the Blade Synthesis Skill Against Undead Grius

Undead Grius will be weak against Light, which makes the Rider of the Blade Synthesis Skill from the Seeker Archetype a top choice for an attack.

Do note that this attack requires the turn for the member equipped with the Knight Archetype, so it is advised that you pass the turn for the member using the Knight Archetype to use Rider of the Blade.

Synthesis Skills Explained

Use Knight's Proclamation to Draw Out Undead Grius' Attacks

Undead Grius has a multi-targeted attack called Phantom Dance that deals damage to all members of your party.

Knight's Proclamation will enable the one equipped to be the sole target for Undead Grius' attacks, which prevents the other two party members from incurring damage.

List of All Support Skills

Equip Knight Archetype to Resist Undead Grius' Slash Attacks

Additionally, the Knight Archetype is also resistant to Slash attacks so the majority of the damage dealt by Undead Grius will mostly be dwindling at best.

How to Unlock Knight Archetype and Skills

Experiment with Synthesis Skills

You will first learn how to use Synthesis Skills when battling Undead Grius during this point in the game. Try using the Retry Command of the game, and learn how to use Synthesis Skills in battle.

Make sure you dish out some hefty physical attacks like the Jump Thrust from the Knight Archetype or the Round Slash from the Warrior Archetype.

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