Castrum Fluminis (Hard)

MTQcapture's Video Guide

Player Level: 70

Item Level: 335

Patch 4.3:Under the Moonlight

Orchestrion Roll:TBD

Tsukuyomi

Phase 1 Alerts

Players should be wary of their positioning during Nightfall to ensure that they can handle other mechanics.
Midnight Haze adds should be killed as quickly as possible.

Torment Unto Death
Tank Healer AoE - Cone Tankbuster

Important Notes:

This attack is a large heavy hitting tankbuster with a cone telegraph - tanks should keep the boss facing away from the group as much as possible.

Zashiki-asobi
Everyone AoE - Area

Important Notes:

This attack drops consecutive circular AoEs in a pattern around the arena.
These AoEs explode in the order they appear - players can stand next to the first AoE along the edge until the centre circle goes off, at which point everyone can move into the centre.

Nightfall
Variation

Important Notes:

Pay attention to the boss' cast bar to determine which attack will be used.

Steel of the Underworld

Everyone AoE - Cone

This attack hits in a large frontal cone facing the primary threat target - dodge as necessary.

Lead of the Underworld

Everyone Line of Sight

A single player will be marked with the Line of Sight marker - all players must stand inline with this player to soak damage.
If the adds from Midnight Haze are still present during this cast, the marked player can stand inline with the add to allow players to continue attacking.

Reprimand
Healer Raid Wide Damage

Important Notes:

This attack hits the group for moderate damage - shield and heal as necessary.

Midnight Haze
Everyone Spawn Tether

Important Notes:

Two Midnight Haze adds will spawn and tether to each other.
These adds must be destroyed before their casts go off.

Nightbloom
Healer Raid Wide Damage Stun Ultimate

Important Notes:

The boss will move to the centre of the arena and use this attack, signalling the next phase.

Phase 2 Alerts

This phase should be cleared as quickly as possible to minimize damage from Nightbloom.

Duty Gauge: Suffering

This gauge fills over the course of this phase - destroy all adds in the phase as fast as possible to reduce damage from the following Nightbloom.

Attack Script

Specter of the Matriarch, Patriarch
Specter of Asahi
Specter of Zenos
Nightbloom

Specter of the Matriarch, Patriarch, Asahi
Everyone Spawn Tether

Important Notes:

Similarly to Midnight Haze, adds will spawn and must be destroyed before their casts go off.

Specter of Zenos
Everyone Knockback Spawn Stun

Important Notes:

The last add to spawn will be Zenos and will briefly knock all players back and stun them - defeat Zenos as fast as possible to proceed.
Healers should be prepared to heal through the following Nightbloom.

Phase 3 Alerts

Selenomancy will occur twice during the fight, with the second occurrence adding more of the previously seen mechanics to increase complexity.

Selenomancy

This attack splits the arena into two sections - white and black.
Standing in either section will add debuffs that will kill you if they reach 5.
These debuffs can be removed by moving to the opposite side from the one you are standing in, thereby resetting the stacks and beginning the opposite debuff.

Selenomancy
Everyone Debuff Mechanic

Important Notes:

This attack alters the arena so that one half is white and the other black - standing on either half will build up a unique debuff that will kill you if it reaches 5.
These debuffs can be reset by moving into the opposite side of the arena at which point you will begin stacking the new debuff.

Donut AoE
Everyone AoE - Donut

Important Notes:

This attack occurs during Selenomancy and places 2 large donut AoEs on the arena - avoid as necessary.

Antitwilight / Perilune
Healer Raid Wide Damage

Important Notes:

This attack will remove the arena effects of Selenomancy and hit the group for moderate damage - shield and heal as necessary.

Dance of the Dead
Healer Raid Wide Damage

Important Notes:

This attack hits for heavy raid wide damage and signals the final phase change.

Phase 4 Alerts

All attacks will repeat with overlap.
Players should ensure to stay stacked for all 3 of Lunacy's hits before dispersing.

Lunacy
Everyone Stack

Important Notes:

All players should stack to soak the damage of all 3 of this attack's hits.
Players should ensure that they stay stacked for all 3 hits before dispersing.

Dark / Bright Blade
Variation

Dark Blade

Everyone AoE - Area

This attack hits in a massive area on the right side of the arena.

Bright Blade

Everyone AoE - Area

This attack hits in a massive area on the left side of the arena.