|Final Fantasy XIII Eidolon|
|Location||Nautilus Park (The Fiendlord's Keep)|
|Abilities||Doom, Valkyrian Scythe, Pyroshot, Pyroburst|
|Notes|| - Yields to those who amass chain bonuses.|
- Yields to those who strengthen their allies.
Do your worst, you freak!
- See also: Brynhildr (Summon)
Like all Eidolons, Brynhildr inflicts Doom on Sazh at the beginning of the battle, and instead of defeating her, Sazh must fully fill up her Gestalt bar.
Sazh should apply Vigilance to both himself and Vanille to stave off knockback, and Haste to quicken their actions. SYN/SAB combo builds the Gestalt meter well. The party can heal with a paradigm like COM/MED and then begin building chain with RAV/RAV.
It is simpler (and often easier) to have Sazh exclusively as a Synergist, and use Vanille as a Medic and Ravager. To begin, Sazh should cast Haste and Vigilance on himself, and then use the same on Vanille. After that, he should cast Faith, Bravery, and whatever En-Spells he may have. The player might have him switch to Ravager now and then, but constantly use the Synergist abilities and switch to SYN/MED whenever HP is low, or if the buffs expire.
An alternative to quickly fill the Gestalt bar, is to start the battle with SYN/SAB and cast the respective buffs and debuffs, mainly Haste and Vigilance for both characters, Faith for Vanille and Enfrost with Bravery for Sazh. Then the player should now move between COM/RAV to go full offensive, and with the mentioned buffs the bar will fill easily, and COM/MED to keep overall offensive while Vanille quickly heals any damage with her Faith buff, which shouldn't take long, and then switch back to COM/RAV to finish filling the bar.