Boss Guide: Ch17-1 (Gotterdammerung)

Additional Guides

Enemy Layout

Grand Battle 1/1	115,248 Skadi	108,563 Ortlinde
	129,654 Skadi	170,599 Ortlinde
	201,684 Skadi

Section 17: Go, Beyond the Twilight (1/3) AP - 25

Drops	Aurora Steel x2 (100%)
Rewards

Boss Statistics

Ortlinde
	HP	108,563
	LVL	90
	HP	170,599
	LVL	90
	Class	Lancer
	NP Bar
	NP Type	AoE
	Actions	Up to 3 per turn
	Traits	Humanoid, Female, Servant, Divine, Heaven or Earth, Weak to Enuma Elish

Break		Mobilize Aurora: Increase Critical Rate for all allies by 30% [Permanent].
Skill 1		Primordial Rune (Valkyrie): Increase own Quick Card effectiveness by 30% (3 turns). Increase own NP Strength by 20% (3 turns).
Skill 2		Swan Mystic Code A: Apply Evade to self (1 time, 3 turns). Apply Debuff Immune to self (1 time, 3 turns). Apply Damage Cut by 1,000 to self (3 times, 3 turns).
Skill 3		Weaver of Fate B: Increase own NP Gauge by 1 (3 turns). Recover own HP by 1,000 every turn (3 turns). Increase own Critical Rate by 10% (3 turns).
NP		Ragnarök Lífþrasir: Apply Sure Hit for yourself (1 turn). [Activates first] Deal damage to all enemies. Chance to inflict Death for [Demonic] enemies.

Skadi
	HP	115,248
	LVL	90
	HP	129,654
	LVL	90
	HP	201,684
	LVL	90
	Class	Caster
	NP Bar
	NP Type	Support
	Actions	Up to 3 per turn
	Traits	Humanoid, Female, Servant, Divine, King, Heaven or Earth, Weak to Enuma Elish

Battle Start		Twilight Snow Blanket: Increase own NP Gauge to MAX.
Break		Absolute Zero: Inflict Stun on all enemies (1 turn).
Break		Snowshoes Marching On: Increase NP Gauge of all allies to MAX.
Skill 1		Primordial Rune (Skadi): Increase Quick Card effectiveness for one ally by 50% (3 turns). Increase Quick Card Critical Strength for one ally by 100% (3 turns).
Skill 2		Chilling Blizzard B: Decrease DEF for all enemies by 30% (3 turns). Decrease Critical Star Drop Rate for all enemies by 30% (3 turns).
Skill 3		Allfather's Wisdom B+: Increase NP Gauge for one ally by 1.
NP		Gate of Skye: Increase Critical Strength for all allies by 30% (3 times, 5 turns). Apply Evade for all allies (1 time, 3 turns). Apply Death Immune for all allies (1 time, 3 turns). Apply Damage Cut for all allies (3 turns).

Overview

This stage features two bosses, namely Scathach=Skadi (3 HP bars) and Valkyrie (2 HP bars). While both bosses are alive, Valkyrie can perform two moves per turn, while Skadi only does one.
Skadi starts out with a fully charged NP Gauge, but outside of this and the usual effect-on-Break mechanics, there are no especially notable gimmicks in this stage. It should be noted, however, that Skadi’s Break effects (AoE Stun on first Break, and full NP Charge to both bosses on second Break) are considerably more powerful compared to Valkyrie’s (increased Critical Rate for both bosses).
Both bosses retain access to their normal skills and NP. This can potentially cause a scenario where Skadi and Valkyrie both use their NP Charge skills on the same turn, therefore allowing a Valkyrie with only 2 NP bars filled to use NP instantly. In general, the possibility of this happening is quite low, but stunning either Servants on such turns will help ensure the smoothness of a run.
The recommended strategy is to take out Valkyrie as soon as possible, as her Sure Hit AoE NP makes her the greater threat of the two. While Skadi’s Break effects are powerful, their impact is limited without the one-shot threat Valkyrie poses. The best scenario is to beat Valkyrie before Skadi’s first HP bar is depleted, as the AoE Stun can put a rather annoying delay to the process.
After disposing of Valkyrie, it is just a matter of outlasting Skadi, which shouldn’t be too difficult considering her moderate-at-best damage and non-damaging NP.

Team Recommendations

Virtually any decent damage dealing Saber can be used for this stage, but those with either Invincibility Ignore or Sure Hit will have the advantage of being able to bypass the enemies’ Evasions. Miyamoto Musashi is a powerful option for this reason, as well as Suzuka Gozen, Ryougi Shiki (Saber) and Frankenstein(Saber) (the latter having buff removal instead).
Damage supports prove very valuable in the early phase of the fight, especially those with the capability to charge the damage dealer’s NP Gauge. Servants such as Merlin or Zhuge Liang will greatly increase the smoothness of the run, as will alternatives such as Helena Blavatsky and William Shakespeare.
Due to Valkyrie’s NP’s built-in Sure Hit, party-wide Invincibility becomes the primary means of defending (outside of Defense buff stacking, which requires more specific stalling compositions). However, having them is not required as long as Valkyrie is dealt with quickly.
While a proper frontline should be able to handle most of the fight well enough, it is recommended to bring along a Rider damage dealer as backup, preferably those with single-target NP and sustain, such as Sakata Kintoki (Rider) or Ozymandias. Alternatively, Last Man Standing Servants such as Heracles can also be used.

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.