Serial Killer Vinca is a boss that can be fought during the A Brother’s Mercy Quest in Metaphor: Refantazio. Read on to learn how to beat Serial Killer Vinca, his weaknesses, rewards, and the recommended party setup and Archetypes to use against Serial Killer Vinca.

Serial Killer Vinca Overview and Rewards

Serial Killer Vinca Quest and Location

Serial Killer Vinca Boss
Quest	Level	Location
A Brother’s Mercy	66	Disgraced Ruins

Requires Basilio's Bond to be Rank 7

This quest can only be unlocked after Basilio's Rank 7 conversation and must be completed to get his Rank 8 follower bond.

Basilio Bond Guide and How to Unlock

Serial Killer Vinca 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.

Serial Killer Vinca Weakness and Resistances

All Elemental Weakness, Affinities and Resistances

Recommended Party Setup Against Serial Killer Vinca

Protagonist, Basilio, Hulkenberg, Eupha

Character	Explanation
Protagonist	The Protagonist will be taking up the Prince Archetype. Preferably, he should take advantage of his Blackguard's Hammer, a Synthesis Skill from the Summoner. This will let him deal severe dark damage and inflict a one-time weakness to the same element in preparation for his next turn. Have him inherit Item Connoisseur from Tycoon to double the effects of Item consumables.
Basilio	Basilio will be a required party member for this battle, naturally he will be using the Berserker Archertype by default. Since Vinca has a resistance to physical attacks, Basilio's main role will be to debuff him with War Cry and sneak in some damage through his synthesis skills that ignore resistances.
Hulkenberg	Hulkenberg will be taking up the Warlord Archetype and should inherit Frigid Fortress Tactic from General. Her main role will be to inflict Ice weakness and to prepare a passive boost through the skill Back Boost.
Eupha	Eupha will be using the Devil Summoner Archetype. She will be working in tandem with Hulkenberg by attacking the enemy with Summon Fairy (Modified) after getting the one-time weakness to Ice. It is also optional to inherit Patra or Pen Patra from Healer lineage to help deal with status ailments but this can also be subbed with item use.

Recommended Archetypes Against Serial Killer Vinca

Prince, Berserker, Warlord, Devil Summoner

Archetype	Recommended Skills
Prince	・Hero's Proving ・Royal Slash Synthesis Skill: ・Blackguard's Hammer
Berserker	・Slam Strike ・Charge ・War Cry Synthesis Skill: ・Wanton Destruction ・Battlecry Tackle
Warlord	・Back Boost Inherited Skill: ・ Frigid Fortress Tactic
Devil Summoner	・Summon Fairy (Modified)

Since Vinca does not have any weaknesses, you'll have to make your own. Use the Warlord to inflict a one-time weakness to Ice and have the Devil Summoner attack with Summon Fairy (Modified) to get weakness damage and to extend your turn. If Vinca uses buffs, she can switch to Summon Fury to mitigate in place of damage.

Similarly, the Prince will be creating a one-time weakness and dealing damage using his Synthesis Skill Blackguard's Hammer. the Berserker will be in charge of debuffing Vinca with War Cry and could sneak some damage in with his synthesis skills as well.

All Archetypes and How to Unlock

How to Beat Serial Killer Vinca

How to Beat Serial Killer Vinca
Create Your Own Weakness Be Prepared to Recover from Daze

Create Your Own Weakness

Serial Killer Vinca has no weaknesses and is resistant to all physical attacks. That said, the easiest way to take this enemy down is to create your own weaknesses through skills like Blackguard's Hammer or Frigid Fortress Tactic.

This lets your party maximize the damage it can deal to the enemy while extending your turn.

Be Prepared to Recover from Daze

Vinca has attacks that would inflict your party with Daze. If you do not want to use the skills like Patra or Pen Patra to conserve MP, make sure to have these items in stock to recover from this status ailment.

Items to Cure Daze

Daze Status Effect and How to Cure

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