Fate/Requiem Collab - Challenge Guide: Child of the Underworld (Utsumi Erice)

Additional Guides

Enemy Layout

Fatal Battle 1/1	480,389 Utsumi Erice	124,960 Evil Spirit
	647,514 Utsumi Erice
	851,361 Utsumi Erice

[High Difficulty] Child From the Netherworld AP - 5

Drops	Ghost Lantern x1 (300%)
Rewards	Crystallized Lore x1

Requirements: The Event Main Quest line, all Bonus Quests for the Event, and Singularity: Solomon must be completed before this quest can be attempted.

Boss Statistics

Utsumi Erice
	HP	480,389
	LVL	80
	HP	647,514
	LVL	80
	HP	851,361
	LVL	80
	Class	Lancer
	NP Bar
	NP Type	AoE
	Actions	Up to 3 per turn
	Traits	Servant, Female, Humanoid, Riding, Divine, Child, Pseudo-Servant, Hominidae, Weak to Enuma Elish, Lawful Balanced

Passive		Evil Barrier: Gain Resistance to all attacks for every Evil Spirit on the field: 40% Damage Resist per Evil Spirit, max 80%.
Battle Start		"Can you stop me from getting serious?": Summon 1 Evil Spirit.
Special Skill 1		"Awaken, Evil Spirits!": Summon 1 Evil Spirit.
Special Skill 2		Transform - Branch Sword: Give a random Evil Spirit the passive: Increase Utsumi Erice's Critical Rate by 50% while on the field (5 turns). *Can target self if no Evil Spirits on field.
Special Skill 3		Transform - Branch Axe: Give a random Evil Spirit the passive: Increase Utsumi Erice's ATK by 50% while on the field (5 turns). *Can target self if no Evil Spirits on field.
Special Skill 4		Transform - Scythe: Give a random Evil Spirit the passive: Increase Utsumi Erice's Critical Strength by 100% while on the field (5 turns). *Can target self if no Evil Spirits on field.
Break		"You're pretty capable... Let's do another trick!": One of two effects: - If Evil Spirit on the field: Decrease Max HP of all enemies by 4,000 (5 turns). - No Evil Spirit on field: Summon 1 Evil Spirit.
Break		"Final sprint, here we come!": One of two effects: - If Evil Spirit on the field: Decrease Max HP of all enemies by 4,000 (5 turns). - No Evil Spirit on field: Summon 1 Evil Spirit.
Skill 1		Evil Spirit Medium Miko A: Increase own Arts Card effectiveness (3 turns). Apply Evade to self (2 times, 3 turns).
Skill 2		The Freeshooter (Imitation) B: Apply Sure Hit to self (1 turn). Increase own Critical Rate by 10% (1 turn).
Skill 3		Shinigami B: Increase own Instant Death success rate (3 turns). Increase own Critical Strength (3 turns). Apply Special ATK [Servant] to self (3 turns).
NP		Amenosakahoko: Deal damage to all enemies. Remove Defensive Buffs from all enemies. Chance of inflicting Instant Death on all enemies [Activates first].

Evil Spirit
	HP	124,960
	LVL	54
	Class	Assassin
	NP Bar
	NP Type	ST
	Actions	Up to 3 per turn
	Traits	Demonic, Undead

Note		Summoned by Erice at the start of battle, after each break, or randomly from a special skill.
Passive		Soul Devourer: When normal attacking, decrease Max HP for target by 2,000 (3 turns) and increase own Max HP by 2,000 (3 turns).

Overview

A challenging fight against Erice, a Lancer with three break bars, who can summon Assassin-class Evil Spirits to assist her in battle. This encounter can technically be soloed with certain Servants (see Video Links).
Erice gains unremovable Damage Resist for every Evil Spirit on the field, at 40% Resist per Evil Spirit (max 80%, since she can rarely summon a second Evil Spirit using a skill even if one is on the field). The buff becomes inactive if Evil Spirits are killed.
Erice sometimes will use skills that grant a passive buff to an Evil Spirit on the field, which enhances Erice's offensive performance (Crit Rate, Crit Damage, or ATK) while that Evil Spirit is alive. She can use the same buff on herself.
Evil Spirits also have the passive ability to stack Max HP Down debuffs with every normal attack while increasing their own Max HP.
On both breaks, Erice will summon another Evil Spirit on the field if there aren't any; otherwise she inflicts a Max HP -4000 debuff on the frontline party.
Be wary that Erice's NP hits AoE and has a small chance of Instant Death.

Team Recommendations

Bringing strong ST Saber damage dealers is ideal, given Class Advantage against Erice. Berserkers also work well. Note the Evil Spirit enemies are Assassins.
Make sure to equip the Event Damage CE, Looking up at the Starry Sky on your primary damage dealer! Having it max-limit broken (requires 5 copies) is preferable.
NP Gauge / Damage Support for your damage dealer's card color of choice (Merlin, Skadi, Tamamo) is great as always to help reach enough damage to break Erice's HP bars quickly. General supports such as Waver are also excellent, and Nero Claudius (Bride) is particularly strong as an option for this encounter since she also is an ST Saber.
If opting for a quick clear, using the Chaldea Combat Uniform with Order Change will help with buff stacking and filling the damage dealer's NP Gauge quickly.
For solo setups, the skill cooldown reduction and invincibility on Atlas Academy Uniform help a great deal with the stability of the fight.