Halloween 2018 Revival Challenge Quest Guide: Encore, Brave Girl! (Elisabeth Bathory)

Enemy Layout

Fatal Battle 1/1	124,820 Nitocris	196,890 Elisabeth	169,410 Ibaraki-Douji
		151,332 Elisabeth	100,808 Robin Hood
		248,760 Elisabeth

[High Difficulty] Encore, Brave Girl! AP - 5

Drops	Saber Monument x1 (100%) Archer Monument x1 (100%) Lancer Monument x1 (100%) Caster Monument x1 (200%) Berserker Monument x1 (100%)
Rewards	Crystallized Lore x1

Boss Statistics

Elisabeth Bathory (1st form)
	HP	196,890
	LVL	90
	Class	Lancer
	NP Bar
	NP Type	AoE
	Actions	Up to 3 per turn
	Traits	Female, Humanoid, Servant, Dragon, Evil, Weak to Enuma Elish

Battle Start		Start the Concert!: Increase Critical Damage and Critical Chance for all allies (3 turns), and Increase Critical Damage and Critical Star Generation for all enemies (buffs Master's team) (3 turns).
Skill 1		Sadistic Charisma A: Increase ATK for all allies (3 turns). Further increase ATK for all female allies except herself (3 turns).
Skill 2		Torture Technique A: Decrease DEF for a single enemy (3 turns).
Skill 3		Battle Continuation B: Apply Guts to self (1 time, 4 turns).
NP		Bathory Erzsebet: Deal heavy DEF-ignoring damage to all enemies. Apply Curse to all enemies (3 turns).

Elisabeth Bathory (2nd form)
	HP	151,332
	LVL	90
	Class	Caster
	NP Bar
	NP Type	AoE
	Actions	Up to 2 per turn
	Traits	Female, Humanoid, Servant, Dragon, Evil, Weak to Enuma Elish

After Break		Next Up, a Pop Song♡: Restore HP for all allies and all enemies each turn (6 turns). Elisabeth restores 10,000 HP per turn; all others restore 3,000 HP per turn.
Skill 1		Innocent Monster EX : Increase own Critical Rate (3 turns). Recovers own HP.
Skill 2		Mana Burst (Pumpkin) A: Increase own Buster Card effectiveness (1 turn). Apply Burn to all enemies (10 turns, 300 dmg/turn).
Skill 3		Performance Continuation A: Apply Guts to self (1 time, 5 turns). Increase own Critical Rate.
NP		Bathory Halloween Erzsebet: Deal heavy DEF-ignoring damage to all enemies. Apply Curse to all enemies (3 turns).

Elisabeth Bathory (3rd form)
	HP	248,760
	LVL	90
	Class	Saber
	NP Bar
	NP Type	ST
	Actions	Up to 3 per turn
	Traits	Female, Humanoid, Servant, Dragon, Heaven or Earth, Weak to Enuma Elish

After Break		Last One! Let's Get Pumped!: Buffs own Attack (Powermod) by 50% (9 turns). Buffs Attack (Powermod) of all allies and for all enemies by 30% (9 turns).
Skill 1		Hero's Principles EX: Apply Invincible to self (1 turn). Increase own NP Gauge by 1.
Skill 2		Mana Burst (Courage) D: Increase own Buster Card effectiveness (1 turn). Increase own DEF (1 turn).
Skill 3		Legend of the Crimson Hero EX : (Not sure if used) Decrease NP Gauge to 0. Randomly apply one effect: -Increase own Buster Card effectiveness (3 turns). -Apply Invincible to all allies (1 turn). -Recover HP for all allies. -Increase ATK for all allies (1 turn). -Increase Critical Rate for all allies (1 turn).
NP		Báthory Brave Erzsébet: Deal significant DEF-ignoring damage to a single enemy. Apply Burn to the target (5 turns).

Ibaraki-Douji
	HP	169,410
	LVL	83
	Class	Berserker
	NP Bar
	NP Type	ST
	Actions	Up to 2 per turn
	Traits	Female, Humanoid, Servant, Heaven or Earth, Demonic, Weak to Enuma Elish

Skill 1		Demonic Nature of Oni A: Increase ATK for all allies (3 turns). Increase own NP Strength (3 turns).
Skill 2		Disengage A: Remove own debuffs. Recovers own HP.
Skill 3		Morph A : Increase own DEF (3 turns). Further increase own DEF (1 turn).
NP		Great Grudge of Rashomon: Deal significant damage to a single enemy. Remove buffs from a single enemy (applies after damage). Decrease DEF for a single enemy (3 turns).

Nitocris
	HP	124,820
	LVL	90
	Class	Caster
	NP Bar
	NP Type	AoE
	Actions	Up to 2 per turn
	Traits	Female, Humanoid, Servant, Heaven or Earth, Divine, King, Weak to Enuma Elish

Skill 1		Egyptian Magecraft A: Increase own Instant-Death success rate (3 turns). Recovers own HP.
Skill 2		Rapid Words of Divine B: Increase own NP Gauge by 2.
Skill 3		Affection of the Sky God B: Apply Guts to self (1 time, 3 turns). Remove Debuffs from self.
NP		Anpu Neb Ta Djeser: Deal heavy damage to all enemies. Chance to inflict Death on all enemies.

Robin Hood
	HP	100,808
	LVL	90
	Class	Archer
	NP Bar
	NP Type	ST
	Actions	Up to 3 per turn
	Traits	Male, Servant, Humanoid, Brynhild's Beloved, Weak to Enuma Elish

Skill 1		Sabotage A: Apply Poison to all enemies (5 turns, 500 dmg/turn). Decrease ATK for all enemies (3 turns).
Skill 2		Golden Rule E: Increase own NP Gauge by 1.
Skill 3		May King B: Apply Evade to self (1 turn). Apply Sure Hit to self (1 turn). Increase own Critical Rate (1 turn).
NP		Yew Bow: Deal significant damage to a single enemy. Deal extra Special Attack damage to a [Poisoned] enemy.

Requirements

Masters need to have cleared the Final Singularity to access this Challenge Quests
In addition, Masters need to have cleared the various limited formation "Challenge Quests" before they can access this.
(Don't worry! - this Challenge Quest isn't difficult after Nero Fest/clearing the Final Singularity!)

Overview

The misadventures of Elisabeth and her heroic posse continue by meeting their most challenging foe yet: You!
A Servant melee awaits, each of the different Elisabeth Bathory's will join the fray over the course of the fight and the main gimmick is that on entry/each Break they will buff allies and enemies alike with various beneficial buffs.
With HP Pools that aren't terribly high, and no other gimmicks, this Challenge Quest can be beaten with any competent and well-formed (AoE) team.
Note: All Halloween Event Servant Bonus Damage buffs are still in effect!

Gameplay Tips

All Elisabeth Bathory Noble Phantasms Pierce Defense.
All Elisabeth Bathory buffs can be removed.
The Critical Damage Up/Critical Chance Up buff on entry may cause some random critical deaths if unlucky and unprotected.
Nitocris can cause Instant Death (which ignores everything except Guts), best not to spin the RNG-wheel and simply take her out before she can NP. It may also induce stress from Nero Fest First Hassan flashbacks.
Nitocris's NP Charge grants 2 NP Charges, although she only acts more than once if Elisabeth Bathory dies before her (unlikely).
Ibaraki's Noble Phantasm removes buffs after dealing damage.
Robin Hood can charge his NP and will cast his Evasion if low on HP.
Elisbeth Bathory (Brave) can hit fairly hard, and can charge her NP with her Invincibility buff which she is prone to cast on low HP.

Team Recommendations

With fairly low HP pools as well as bonus damage buffs granted by the enemy, Masters have immense freedom in picking their main DPS.
Nonetheless, with mulltiple Servants to battle at once, and with either nasty side-effects on their Noble Phantasm (Nitocris/Ibaraki) or a short charge bar (Robin), AoE Servants are the ideal pick.
In general, stacking offensive buffs is far preferable to stalling this fight out. A single powerful AoE NP can clear the field and take out one of Elisabeth Bathory's HP bars.
Considering Masters need to chew through 3 full Elisabeth HP bars while also taking out her background artists, it's quite likely she will cast at least one Noble Phantasm. Bring an Evasion/Invincibility as all of her NPs pierce Defense.
Buff Removal is actually rather effective at making the final Elisabeth incarnation easy to deal with - but it's generally not needed.
With 5 different enemy classes, Berserker (AoE) Servants (Raikou's Mystic Slayer is massive here) all work great here especially with massive buff stacks.
Extra-class Servants also perform well in these mixed-class Challenge Quests.
Riders have some class advantage here with no class disadvantage.
Casters have no class disadvantage.
Archers are a good pick too, especially as Masters can prepare an (ST) Saber to pair them with to Break Elisabeth bathory on turn 1. Their class advantage against the strongest Elisabeth Bathory will quickly wrap up the final stretch.
Regardless, as long as Masters stack enough buffs, many different Servants can 3-turn this encounter. From Raikou to Arjuna, to a grailed NP5 Mordred (Rider).

Video Links

Note that these videos are not affiliated with GamePress, but showcase some lineups that are effective in clearing the final challenge. These can serve as a good reference for how to rotate skills during this quest or simply to have a look at the encounter before diving in.