A Rare Phenomenon

A Rare Phenomenon ↑ ↓
Kill a rare enemy of all the following types.
Type	Challenges
Points	30 (cumulative)
Checklist
See article
Achievement Series ← Rarin' to Go

A Rare Phenomenon is a Challenges Achievement which requires killing all 76 of the randomly spawning Rare monster types (with unique yellow names and additional abilities).

Monsters

Monster	Act	Location
Ravenous Dead	Act I	Cathedral Level 1 The Weeping Hollow Cemetery of the Forsaken Defiled Crypt Fields of Misery
Skeleton	Act I	The Weeping Hollow Cemetery of the Forsaken Defiled Crypt Cathedral Level 2 Cathedral Level 3 Cathedral Level 4 The Royal Crypts Development Hell Fields of Misery
Hungry Corpse	Act I	The Weeping Hollow Cemetery of the Forsaken Defiled Crypt
Scavenger	Act I	The Weeping Hollow Defiled Crypt Fields of Misery
Retching Cadaver	Act I	The Weeping Hollow Defiled Crypt
Imp	Act I	Defiled Crypt
Harvester	Act I	Cathedral Level 4
Skeletal Archer	Act I	Cathedral Level 4 The Royal Crypts
Savage Beast	Act I	Fields of Misery Southern Highlands Northern Highlands
Quill Demon	Act I	Scavenger's Den Level 1
Enraged Phantom	Act I	Decaying Crypt
Returned Archer	Act I	The Festering Woods
Arachnid Horror	Act I	Caverns of Araneae
Dark Cultist	Act I	Southern Highlands Northern Highlands Leoric's Hunting Grounds Leoric's Manor Halls of Agony Level 1 Halls of Agony Level 2 Highlands Passage Halls of Agony Level 3
Unholy Thrall	Act I	Halls of Agony Level 3
Dark Berserker	Act I	Leoric's Manor Halls of Agony Level 1 Halls of Agony Level 2 Highlands Passage Halls of Agony Level 3
Disentombed Hulk	Act I	Halls of Agony Level 1 Halls of Agony Level 2
Savage Fiend	Act I	The Cursed Hold
Lacuni Huntress	Act II	Sundered Canyon Howling Plateau Black Canyon Mines Stinging Winds
Fallen	Act II	Sundered Canyon Howling Plateau Black Canyon Mines Stinging Winds Road to Alcarnus Eastern Channel Hidden Aqueducts
Fallen Overseer	Act II	Howling Plateau Black Canyon Mines Stinging Winds Road to Alcarnus
Bone Warrior	Act II	Howling Plateau Black Canyon Mines Sewers of Caldeum Ruined Cistern The Forgotten Ruins Cave of the Betrayer Level 2
Cave Wing	Act II	Sirocco Caverns Level 1
Vicious Ghoul	Act II	Sirocco Caverns Level 1 Sirocco Caverns Level 2
Frenzied Hellion	Act II	Road to Alcarnus Alcarnus Alcarnus Cellar Sandy Cellar
Betrayed	Act II	Tomb of Sardar Tomb of Khan Dakab
Skeletal Ranger	Act II	Sewers of Caldeum
Skeletal Sentry	Act II	The Forgotten Ruins
Noxious Guardian	Act II	Western Channel
Dune Dervish	Act II	Dahlgur Oasis
Serpent Magus	Act II	Dahlgur Oasis The Ruins Level 1 The Ruins Level 2
Fallen Peon	Act II	Dahlgur Oasis
Fallen Cur	Act II	The Storm Halls
Fallen Conjurer	Act II	Dahlgur Oasis
Spine Hewer	Act II	The Forgotten Ruins
Accursed	Act II	Eastern Channel Desolate Sands
Murderous Fiend	Act II	Eastern Channel Cave of the Betrayer Level 1 Cave of the Betrayer Level 2 Vile Cavern Level 1
Webspitter Spider	Act II	Cave of the Betrayer Level 1 Cave of the Betrayer Level 2 Vile Cavern Level 1 Vile Cavern Level 2
Brood Hatchling	Act II	Cave of the Betrayer Level 1 Cave of the Betrayer Level 2 Vile Cavern Level 1 Vile Cavern Level 2 The Storm Halls
Lacuni Slasher	Act II	Desolate Sands
Sand Dweller	Act II	The Forgotten Ruins
Ancient Walker	Act II	Desolate Sands
Reaper	Act II	Cave of Burrowing Horror Level 1 Cave of Burrowing Horror Level 2
Skeletal Raider	Act II	The Storm Halls
Dust Imp	Act II	The Ruins Level 2 The Ruins Level 1
Smoldering Construct	Act II	The Unknown Depths
Charged Construct	Act II	The Storm Halls
Sand Behemoth	Act II	Realm of Shadow
Fallen Hellhound	Act III	Rakkis Crossing Bridge Stores Tower of the Damned Level 1
Demon Trooper	Act III	Skycrown Battlements Stonefort The Keep Depths Level 1
Fallen Grunt	Act III	Skycrown Battlements Stonefort The Barracks Level 1 The Barracks Level 2 The Forward Barracks
Fallen Prophet	Act III	Skycrown Battlements Stonefort The Barracks Level 1 The Barracks Level 2 The Forward Barracks
Fallen Slavelord	Act III	Skycrown Battlements Rakkis Crossing
Fallen Soldier	Act III	Skycrown Battlements Rakkis Crossing Bridge Stores Edge of the Abyss Arreat Crater Level 1
Demonic Hellflyer	Act III	Skycrown Battlements Stonefort The Barracks Level 1 The Battlefields Rakkis Crossing
Maniacal Golgor	Act III	The Core of Arreat
Soul Ripper	Act III	The Keep Depths Level 1 The Keep Depths Level 2 The Breach
Skeletal Marauder	Act III	Battlefield Stores
Skull Cleaver	Act III	Battlefield Stores
Skull Sword	Act III	The Keep Depths Level 2 Battlefield Stores
Demonic Tremor	Act III	The Keep Depths Level 2 The Keep Depths Level 3 The Battlefields Fields of Slaughter
Herald of Pestilence	Act III	The Arreat Gate The Battlefields The Bridge of Korsikk Fields of Slaughter Rakkis Crossing Arreat Crater Level 1
Blood Clan Warrior	Act III	The Battlefields The Bridge of Korsikk The Underbridge Fields of Slaughter Rakkis Crossing
Wintersbane Huntress	Act III	Caverns of Frost Level 1 Caverns of Frost Level 2
Stygian Crawler	Act III	Arreat Crater Level 1 Arreat Crater Level 2 The Core of Arreat
Blood Clan Occultist	Act III	Arreat Crater Level 2 Tower of the Cursed Level 1 Tower of the Cursed Level 2
Hulking Phasebeast	Act III	Arreat Crater Level 2
Succubus	Act III	Arreat Crater Level 2 The Core of Arreat
Subjugator	Act IV	Gardens of Hope 1st Tier Hell Rift Gardens of Hope 2nd Tier The Silver Spire Level 1
Armaddon	Act IV	Sacellum of Virtue
Darksky Fire Demon	Act IV	Gardens of Hope 2nd Tier
Mallet Lord	Act IV	The Silver Spire Level 1
Morlu Legionnaire	Act IV	The Silver Spire Level 1 The Silver Spire Level 2
Morlu Incinerator	Act IV	The Silver Spire Level 1 The Silver Spire Level 2
Armored Destroyer	Act IV	The Silver Spire Level 2
Enslaved Nightmare	Act IV	The Silver Spire Level 2

Achievement series

Achievement		Points	Reward		Description
	Keep It Rare	10		Banner Sigil Death	Kill 10 rare enemies of the following types.
	Rarin' to Go	20 (cumulative)		Banner Pattern Bright Lightning	Kill 50 rare enemies of the following types.
	A Rare Phenomenon	30 (cumulative)	–		Kill a rare enemy of all the following types.

Related achievements

Achievement		Points	Reward		Description
	Trophy Hunting	10		Banner Sigil Hell Steed	Kill each type of rare enemy in Hardcore mode.