There are two epic enemy accessible via either faction's fleet. The Dreadful Entity codex is no longer obtainable, and the Hateful Entity has no codex, nor are they required for any achievements.
The Dreadful Entity bonus boss.
Codex type: Achievement: Epic Enemies
Codex location: Asation: Green Eclipse: Quadrilateral Forum
Codex coordinates: -483, 460
Faction: Both
Class: Bounty Hunter - Imperial Agent - Jedi Consular - Jedi Knight - Sith Inquisitor - Sith Warrior - Smuggler - Trooper
Associated Achievement: None
Special Requirements: Dreadful Amulet, Dread Guard's Corrupted Mask, Crest of the Dread Masters
Dreadful Amulet
The Dreadful Entity does not spawn like a normal boss, and instead must be summoned. To summon the boss you must have a Dreadful Amulet in your inventory and must activate it in the pictured location. The Dreadful Amulet drops from Nightmarish Dreadtooth and may be used every 23 hours. The Dreadful Entity may only be summoned within [VETERAN] Terror from Beyond.
Dread Guard's Corrupted Mask
Crest of the Dread Masters
The Dreadful Entity has a special passive called Dread Touch which kills players immediately. The only way to protect from this passive is by wearing a Dread Guard's Corrupted mask, which drops from Dreadtooth, or Crest of the Dread Masters, which drops from the Hateful Entity. Both headpieces are modable to keep them competitive in modern updates.
The Dreadtooth world boss.
Item: Dreadful Amulet, Dread Guard's Corrupted Mask
Item location: Belsavis: Section X
Item coordinates: 552, -1825
Faction: Both
Class: Bounty Hunter - Imperial Agent - Jedi Consular - Jedi Knight - Sith Inquisitor - Sith Warrior - Smuggler - Trooper
Associated Achievement: Nightmarish Dreadtooth
Special Requirements: Requires 10 stacks of Dreadful Essence
The Hateful Entity bonus boss.
Codex type: Achievement: Epic Enemies
Codex location: Darvanis: Collapsed Ruins
Codex coordinates: 243, 96
Faction: Both
Class: Bounty Hunter - Imperial Agent - Jedi Consular - Jedi Knight - Sith Inquisitor - Sith Warrior - Smuggler - Trooper
Associated Achievement: None
Special Requirements: Dreadful Orb, Dread Guard's Corrupted Mask, Crest of the Dread Masters
Dreadful Orb
The Hateful Entity does not spawn like a normal boss, and instead must be summoned. To summon the boss you must have a Dreadful Orb in your inventory and must activate it in the pictured location. The Dreadful Orb drops from Dreadful Entity and may be used every 23 hours. The Hateful Entity may only be summoned within [MASTER] Scum and Villainy.
Dread Guard's Corrupted Mask
Crest of the Dread Masters
The Hateful Entity has a special passive called Dread Touch which kills players immediately. The only way to protect from this passive is by wearing a Dread Guard's Corrupted mask, which drops from Dreadtooth, or Crest of the Dread Masters, which drops from the Hateful Entity. Both headpieces are modable to keep them competitive in modern updates.