Boss: Megalos Ch11-6 (Agartha)

Enemy Layout

Fatal Battle 1/1

251,240

Megalos

Drops	Warhorse's Young Horn x1 Pt 3 Seed of Yggdrasil x1 Pt 3 Magic Gem of Lancer x1 Pt 3 Claw of Chaos x1 Pt 4 Seed of Yggdrasil x1 Pt 4 Magic Gem of Lancer x1 Pt 4 Phoenix Feather x1 Pt 5 Berserker Piece x1 Pt 6 Seed of Yggdrasil x1 Pt 7 Gem of Saber x1 Pt 7 Berserker Monument x1 Pt 7
Rewards	Saint Quartz x1 Phoenix Feather x3 (JP Only) Reveals the True Name of Rider of Resistance (Part 6) Reveals the True Name of Berserker of El Dorado (Part 7)

Boss Statistics

Megalos
	HP	251,240
	LVL	90
	Class	Berserker
	NP Bar
	NP Type	AoE
	Actions	Up to 4 (!!!) per turn
	Traits	Servant, Male, Humanoid, Divine, Greek Mythology Males, Super Giant, Weak to Enuma Elish

Active Buff		Decrease own ATK (Cannot be removed).
Active Buff		Decrease own DEF (Cannot be removed).
Active Buff		Revives with 50% HP (125,620 HP) upon death (8 times, Cannot be removed). After his 4th Guts is consumed, the battle ends.
Normal Attack		He has both a single target and AoE normal attack.
Skill 1		Increase own ATK (3 turns). Increase own Mental Debuff Resistance (3 turns).
Skill 2		Applies Target Focus to one enemy (1 time, 2 turns). Cast every ~3 turns (?) as the last action of the turn even if he is disabled. At the beginning of the next turn, he will use a special multi-hitting single target attack on the affected enemy. Note that if he is stunned or unable to act then he will delay its usage and attack someone at random.
Skill 3		Apply Evade to self (1 turn). Increase own Critical Strength (3 turns). Unconfirmed, we expect him not to have it.
NP Effect		Deals heavy damage to all enemies.

Overview

In essence, the second round (11-6) against Megalos is an easier version of the first round (11-5), with Megalos suffering from a permanent Attack Down and Defense Down, in addition to having less HP.

In terms of how Megalos acts, there is no change in the second round compare to the first, so any strategy and team setup used to complete the first round will work for the second round. In case it's been some time since completing the first round, that information can be found here.

Team Recommendations

As mentioned in the Overview, Servants that were effective for the first round are still effective in the second round, so not much sense in fixing something that isn't broken. In case it's been some time since doing the first round, that information can be found here.

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.