Fallout 76 legendary enemies

Legendary enemies are enemies which possess special abilities and drop legendary items upon death

Overview
Occasionally, certain foes with powerful buffs will appear. These legendary enemies will be identifiable by a star (★) and the nameplate prefix  "Legendary". When killed, legendary enemies will drop a randomly generated legendary item with at least one effect. For each star an enemy has, the randomly generated item they drop may have an equal number of legendary effects. When legendary enemies spawn, there is a brief window before they gain their stars. This process is initiated when the enemy becomes veiled with a temporary green fog. If the enemy is killed before the stars appear on its nameplate, then it will not yield any legendary items.

Gameplay
Legendary enemies gain enhanced stats based upon their rank (represented by the number of stars).

Legendary abilities
Depending on what type of enemy they are, legendary enemies possess bonus abilities:

Rage Heal
When their HP is reduced to 40% or below, the actor will regen 99,999 HP (or until they reach their max HP).
 * All enemies

Epic Accuracy
0043F3EF - The cone-of-fire is set to 0.
 * Super mutants
 * Humans
 * Robots

Epic Damage
All of the actor's outgoing damage is doubled.
 * Creatures
 * Animals

Epic Explode
10 seconds after dying, the actor will explode for 500 physical damage and creates a weak radiation hazard.
 * Robots (except Sentry Bots)

Epic Poison
Applies a damage-over-time spell which deals 4-10 poison damage per second over 10 seconds. This does not damage actors which are immune to poison and is resisted with Poison Resistance.
 * Bugs
 * Radscorpions
 * Mirelurks
 * Mirelurk kings
 * Mirelurk queens
 * Mole rats
 * Fog crawlers

Epic Radioactive
All outgoing radiation exposure damage is multiplied by 10 and gains immunity to all radiation damage.
 * Glowing enemies
 * Deathclaws
 * Feral ghouls
 * Bee swarm

Restrictions
There are certain restrictions on how, when and which enemies may spawn in as Legendary enemies:

Exceptions

 * Cannot spawn as legendary enemies
 * Enemies level 9 and lower.
 * Enemies during Daily Ops.
 * Watoga/the Whitespring/Whitespring bunker - All robot enemies cannot spawn legendary.
 * Site Alpha/Bravo/Charlie - while the robots that are initially patrolling the nuclear missile silos may spawn as legendary enemies, those which spawn from the robot pods cannot.
 * Random encounter - feral ghoul/Scorched nuke code officers cannot spawn as legendary enemies.


 * The Forest region is excluded from random legendary spawns in exteriors. Only quest/event and interior spawns are allowed:
 * Fasnacht Day - ★★★ mega sloth boss
 * Free Range - ★★★ Sheepsquatch boss
 * Hordes - ★★★ alphas (excluding "Wolf Horde: The Forest")
 * Leader of the Pack - ★ wolf pack leaders (x3)
 * Project Paradise - ★★★ Fog crawler/Grafton monster/Sheepsquatch
 * Special seasonal enemies such as Treasure Hunters
 * Enemies within interiors, such as the Arktos Pharma biome lab or Charleston Capitol Building


 * Most humans cannot spawn as Legendary enemies
 * Named characters cannot spawn as legendary enemies (Knight Shin, Maul, Rose...)
 * Brotherhood, Cannibals, Communists, Hellcats, Free Radicals, Rust Eagles, scavengers and settlers cannot spawn as legendary enemies.
 * Raiders can randomly spawn as legendary enemies as long as they are not the ones which always spawn at the Crater (includes the raider thief and raider hunter)

Bugs
Bugged to never be legendary:
 * While some enemies may only be spawn as legendary during specific events, a number of enemy types are unable to become legendary at all. The following enemies have a 0% chance to randomly spawn as a legendary outside of a specific quest:


 * Legendary enemies are occasionally marked with their green cloud before the star is added to their nameplate. Legendary enemies killed before the stars are added to their nameplate will never yield a legendary item.