The crafting plans are completely random drops and not linked to monster types at all.

If anyone want to post this list somewhere else then feel free to do so, but please keep the credits (it's at the bottom of my post) and the

links in the credits titles intact or at the very least mention where you got the info from.

Alright then, here's what we have so far:

Adventurer's Journal - Used for Pender's Purchase, Gloves

Drops from all breakable and clickable objects (except chests).

Angelic Shard - Used for the Hallowed Protectors Set

Drops from Fallen Angels. Confirmed from:
- Act 4, The Silver Spire Level 1, Pyres the Damned (rare spawn and bounty target)
- Act 4, The Great Span, Izual
- Act 5, Battlefields of Eternity, Realm of the Banished, Haziael (rare spawn)
- Act 5, Battlefields of Eternity, The Crag of Eternity, Erelus (spawns with "The War That Time Forgot" event)
- Act 5, Pandemonium Fortress Level 2, Celik (rare spawn)

Behistun Rune - Used for Mark of the Magi, Staff

Drops from Cultist Summoners and their Hellions. Confirmed from:
- Act 1, Fields of Misery, Khazra Den, Urik the Seer (fixed spawn, but only in Story Mode, during the "Khazra Den" sub-quest of the "Sword of

the Stranger" main quest)
- Act 1, Leoric's Manor, Jezeb the Conjuror (rare spawn and bounty target)
- Act 1, Leoric's Manor, Krailen the Wicked (rare spawn)
- Act 2, Road to Alcarnus, Yeth (rare spawn and bounty target)
- Act 2, Alcarnus, Shondar the Invoker (rare spawn)
- Act 5, Westmarch Commons, Pontius (rare spawn)

Likely source:
- Act 1, Southern Highlands, Cadhul the Deathcaller (rare spawn)

Bloody Pincer - Used for Demon Claw, Fist Weapon

Drops from Tormented Stingers and Scarabs. Confirmed from:
- Act 3, Arreat Crater Level 1, Severclaw (rare spawn and bounty target)
- Act 3, Tower of the Damned Level 2, Crabbs (rare spawn and bounty target)
- Act 3, Core of Arreat, Scorpitox (rare spawn and bounty target)
- Act 5, Ruins of Corvus, Balata (rare spawn)

Likely sources:
- Act 5, Passage to Corvus, Vosk (spawns during "The Hatchery" event)
- Act 5, Ruins of Corvus, Scarnax (rare spawn)

Born's Key - Used for the Born's Command set

Drops from Zombies and Brigands. Confirmed from:
- Act 1, Cemetery of the Forsaken, Lucious the Depraved (rare spawn and bounty target)
- Act 1, Cemetery of the Forsaken, Defiled Crypt, Dataminer (rare spawn and bounty target)
- Act 1, Cemetery of the Forsaken, Defiled Crypt, Digger O'Dell (rare spawn and bounty target)
- Act 1, Cemetery of the Forsaken, Defiled Crypt, Drury Brown (rare spawn)
- Act 1, Cemetery of the Forsaken, Defiled Crypt, John Gorham Coffin (rare spawn and bounty target)

Captured Nightmare - Used for Night's Reaping, Mighty Weapon

Drops from Terror Demons and Enslaved Nightmares in Act 4. Confirmed from:
- Act 4, The Silver Spire Level 2, Haures (rare spawn)

Likely source:
- Act 4, The Silver Spire Level 2, Grimnight the Soulless (rare spawn and bounty target)

Captured Soul - Used for Lai Yui's Persuader, Daibo

Drops from Soul Rippers. Confirmed from:
- Act 3, The Keep Depths Level 1, Lashtongue (rare spawn and bounty target)
- Act 3, The Keep Depths Level 2, Aloysius the Ghastly (rare spawn)
- Act 3, Tower of the Damned Level 2, Riplash (rare spawn and bounty target)

Cartographer's Toolkit - Used for Board Walkers, Boots

Drops from Ghouls. Confirmed from:
- Act 1, Festering Woods, Enkidu (spawns during the "Eternal War" event")
- Act 1, Festering Woods, Grimsmack (rare spawn)
- Act 3, Rakkis Crossing, Lavarinth (spawns during the "Blaze of Glory" event)
- Act 3, Tower of the Damned Level 1, Gholash (rare spawn)

Cultist Blood - Used for Blood-Magic Edge, Dagger

Drops from Cultists. Confirmed from:
- Act 1, Leoric's Hunting Ground, Percepeus (rare spawn)
- Act 1, Leoric's Hunting Ground, Highlands Cave, Brakan (spawns during "The Apothecary's Brother" event)
- Act 1, Leoric's Manor Courtyard, Sarella the Vile (rare spawn)
- Act 1, Halls of Agony Level 1, Cultist Grand Inquisitor
- Act 2, Alcarnus, High Cultist Murdos (rare spawn and bounty target)
- Act 2, Alcarnus, Jhorum the Cleric (rare spawn and bounty target)

Defiled Doll - Used for Spite, Mojo

Drops from Succubi. Confirmed from:
- Act 3, Tower of the Damned Level 1, Demonika the Wicked (rare spawn and bounty target)
- Act 4, The Silver Spire Level 1, Kysindra the Wretched (rare spawn and bounty target)
- Act 5, Westmarch Commons, House of Deep Sorrow, Lady Victoria

Demon Skin - Used for the Demon's Hide Set

Drops from Phasebeasts and Armored Destroyers. Confirmed from:
- Act 3, The Core of Arreat, Axgore the Cleaver (rare spawn)
- Act 3, Tower of the Damned Level 1, Haxxor (rare spawn)
- Act 3, Tower of the Damned Level 2, Grimmaw (rare spawn and bounty target)
- Act 3, Tower of the Damned Level 2, Brimstone (rare spawn)
- Act 4, Gardens of Hope 1st Tier, Khatun (rare spawn and bounty target)
- Act 4, Gardens of Hope 2nd Tier, Razorclaw (fixed spawn, but only in Story Mode, during the "Corrupt Growths Tier I" sub-quest of "The

Light of Hope" main quest)

Element of Celerity - Used for Fleeting Strap, Belt

Drops from Scavengers. Confirmed from:
- Act 1, Weeping Hollow, Mange (rare spawn and bounty target)
- Act 1, Fields of Misery, Forlorn Farm, Burrow Bile (spawns during the "A Farm Besieged" event, which starts after you inspect the dead

beast at the farm)
- Act 1, Fields of Misery, Dreadclaw the Leaper (rare spawn and bounty target)
- Act 1, Fields of Misery, Lost Mine Level 2, Shanabi (spawns during "The Precious Ores" event)
- Act 1, Southern Highlands, Watch Tower Level 2, Armorer's Bane (spawns during the "Scavenged Scabbard" event)

Essence of the Twin Seas - Used for the Captain Crimson's Trimmings Set

Drops from Dune Threshers. Confirmed from:
- Act 2, Black Canyon Mines, Razormouth (rare spawn and bounty target)
- Act 2, Stinging Winds, Monstrous Dune Thresher (rare spawn, pops out of a small sand pit)
- Act 2, Sewers of Caldeum, Moontooth Dreadshark (rare spawn, comes out of a rubble that spawns in a north-eastern dead end)

Eternal Power Capsule - Used for Arcane Barb, Crossbow

Drops from Cuddle Bears. Confirmed from:
- Act 1, Whimsyshire, Evil Oliver (rare spawn)

Eyes of the Dead - Used for War of the Dead, Two-handed Mighty Weapon

Drops from Skeletons. Confirmed from:
- Act 1, Leoric's Passage, Headcleaver (fixed spawn, but only in Story Mode, during the "Explore Cellar" sub-quest of "The Legacy of Cain"

main quest)
- Act 1, Cathedral Level 2, Merrium Skullthorn (rare spawn and bounty target)

Frozen Blood - Used for Utar's Roar, Axe

Drops from Chiltara in Act 3, Fields of Slaughter, Caverns of Frost Level 2 (rare spawn).

Glowing Ore - Used for Cosmic Strand, Source

Drops from Primordial Scavengers. Confirmed from:
- Act 5, Battlefields of Eternity, Sartor (rare spawn and bounty target)
- Act 5, Battlefields of Eternity, Realm of the Banished, Magrethar (rare spawn and bounty target)
- Act 5, Pandemonium Fortress Level 1, Soul Scavenger (spawns during the "Demon Souls" event)

Likely sources:
- Act 5, Battlefields of Eternity, Barg the Elder (rare spawn)
- Act 5, Battlefields of Eternity, Rockulus (rare spawn)

Griswold's Scribblings - Used for Griswold's Perfection, Sword

Drops from objects and enemies that drop lore journals and from all bookshelves. Confirmed from:
- Act 1, Cathedral, Bookshelves
- Act 1, Cemetery of the Forsaken, Gravedigger's Corpse
- Act 1, Festering Woods, Enmerkar (spawns during the "Last Stand of the Ancients" event)
- Act 1, Wortham Chapel, Bookshelves
- Act 1, Southern Highlands, Cave of the Moon Clan, Urik's Satchel
- Act 1, Southern Highlands, Watch Tower Level 2, after the "Scavenged Scabbard" event
- Act 2, Sewers of Caldeum, Envoy of Belial
- Act 2, Khasim Outpost, Cain's Lost Satchel
- Act 2, Khasim Outpost, Imperial Guard Supplies
- Act 2, Archives of Zoltun Kulle, All Dungeons, Bookcases
- Act 3, Skycrown Battlements, Morgan's Satchel
- Act 3, The Keep Depths, Lore Objects
- Act 4, Multiple areas, Angiris Archives

Hilt of the Silver Wolf - Used for Golden Scourge, Flail

Drops from Fallen Hounds. Confirmed from:
- Act 3, Arreat Crater Level 1, Growlfang (rare spawn and bounty target, I think he may also appear at the Skycrown Battlements)
- Act 3, Tower of the Damned Level 1, Gnawbone (rare spawn)

Human Cartilage - Used for Wall of Man, Shield

Drops from the Unburied. Confirmed from:
- Act 1, Cemetery of the Forsaken, Defiled Crypt, Manglemaw (guards the way to the Chancellor's Tomb)
- Act 1, Cathedral Level 2, Cudgelarm (rare spawn)
- Act 1, Halls of Agony Level 2, Tormented Behemoth (spawns during the "A Stranger in Need" event)

Iron Wolves Doctrine - Used for the Asheara's Vestments Set

Drops from Deceiver Magi. Confirmed from:
- Act 2, Sewers of Caldeum, Hazzor the Viper (rare spawn and bounty target)
- Act 2, Sewers of Caldeum, Ningish (rare spawn)
- Act 2, Dahlgur Oasis, Ssthrass (guards the way to the Ancient Waterway)

Living Flame - Used for Cinder Switch, Two-handed Axe

Drops from Morlu Casters. Confirmed from:
- Act 4, Gardens of Hope 2nd Tier, Radiant Chapel, Malfeas the Abhorrent
- Act 4, The Silver Spire Level 2, Sao'Thall (rare spawn and bounty target)
- Act 4, The Silver Spire Level 2, Rhau'Kye (rare spawn and bounty target)

Lyekurn’s Diary - Used for Corruption, Shoulders

Drops from Azmodan.

Maghda's Tormented Soul - Used for the Cain's Destiny Set

Drops from Maghda.

Mystical Source - Used for the Sage's Journey Set

Drops from Ponies. Confirmed from:
- Act 1, Old Tristram Road, Whimsyshire, Creampuff (rare spawn)
- Act 1, Old Tristram Road, Whimsyshire, Midnight Sparkle (rare spawn)
- Act 1, Old Tristram Road, Whimsyshire, Nightmarity (rare spawn)
- Act 1, Old Tristram Road, Whimsyshire, Scouring Lobber (rare spawn)
- Act 1, Old Tristram Road, Whimsyshire, members of Team Unicorn: Miss Hell, R'Lyeh, Killaire and Maulin Sorely (rare spawns)

Phial of Weakness - Used for Atrophy, Wand

Drops from Heralds of Pestilence. Confirmed from:
- Act 3, The Battlefields, Deadgrasp (rare spawn)
- Act 3, The Battlefields, Handible (spawns during the "Triage" event)
- Act 3, Arreat Crater Level 1, Valifahr the Noxious (rare spawn and bounty target)

Quaking Vial - Used for Sunder, Two-handed Mace

Drops from Mallet Lords. Confirmed from:
- Act 4, Hellrift, Sledge
- Act 4, Hellrift, Hammermash

Reaper's Fear - Used for Reaper's Wraps, Bracers

Drops from Malthael.

Rydraelm Tome - Used for Mantle of the Rydraelm, Chest Armor

Drops from Fallen Shamans. Confirmed from:
- Act 2, Stinging Wind, Lost Caravan, Beyatt (rare spawn)
- Act 2, Dahlgur Oasis, Ashangu (rare spawn)
- Act 2, Dahlgur Oasis, Bashiok (rare spawn)
- Act 2, Dahlgur Oasis, Mundonogo (rare spawn)

Shard of Entsteig Plate - Used for the Aughild's Authority Set

Drops from Enraged Phantoms. Confirmed from:
- Act 1, Cemetery of the Forsaken, Defiled Crypt, Lord Dunhyld (spawns during "The Matriarch's Bones" event)
- Act 1, Festering Woods, Feklar's Ghost (rare spawn and bounty target)
- Act 1, Festering Woods, Hawthorne Gable (rare spawn and bounty target)
- Act 2, Sewers of Caldeum, Raziel (rare spawn, always found in a south-western dead end, escapes from the Ancient Chest Chiman asks you to

open)
- Act 2, Sewers of Caldeum, Shade of Nar Gulle (rare spawn)
- Act 2, Dahlgur Oasis, Tomb of Khan Dakab, Spirit of Khan Dakab
- Act 2, Archives of Zoltun Kulle, Unknown Depths, The Archivist (rare spawn and bounty target)
- Act 2, Archives of Zoltun Kulle, Realm of Shadow, The Tomekeeper (rare spawn and bounty target)

Likely source:
- Act 1, Chancellor's Tomb, Chancellor Eamon (fixed spawn, but only in Story Mode, during the "Northwest Gate" sub-quest of the "A Shattered

Crown" main quest)

Shattered Core - Used for Devastator, Mace

Drops from Sand Dwellers. Confirmed from:
- Act 2, Dahlgur Oasis, Forgotten Ruins, Ancient Guardian (fixed spawn, but only in Story Mode, during "The Forgotten Ruins" sub-quest of the

"Betrayer of the Horadrim" main quest)
- Act 2, Desolate Sands, Ernutet (rare spawn as one of the 10 possible outcomes of the Ancient Device)
- Act 2, Archives of Zoltun Kulle, Unknown Depths, Rockgut (rare spawn and bounty target)
- Act 2, Archives of Zoltun Kulle, Realm of Shadow, Thrum (rare spawn and bounty target)

Shimmering Quill - Used for Unbound Bolt, Bow

Drops from Quill Fiends. Confirmed from:
- Act 1, Old Tristram Road, Dank Cellar, Sarkoth (rare spawn)
- Act 1, Old Tristram Road, Musty Cellar, Gorathra (rare spawn)
- Act 3. The Keep Depths Level 1, Thornback (rare spawn and bounty target)

Shuddering Demon Bone - Used for Archfiend Arrows, Quiver

Drops from Morlu. Confirmed from:
- Act 4, Gardens of Hope 2nd Tier, Kao' Ahn (rare spawn)
- Act 4, Gardens of Hope 2nd Tier, Oah' Tash (rare spawn and bounty target)

Skelon's Dice - Used for Skelon's Deceit, Pants

Drops from Oppressors and Warscarred Ravagers. Confirmed from:
- Act 4, Gardens of Hope 1st Tier, Torchlighter (rare spawn)
- Act 5, Unearthed Ruins Level 2, Vekriss (choose Covetous Shen's "The Jewel of Dirgest" conversation option to enter the ruins, can only be

done once per character)
- Act 5, Path of War, Belphegor (fixed spawn, but only in Story Mode, after the beginning of the quest "The Battlefields of Eternity")
- Act 5, Battlefields of Eternity, Korchoroth (escapes from the Timeless Prison)
- Act 5, Battlefields of Eternity, Infested Ruins, Keeper Hashemel (spawns during "The Cursed Crystals" event)
- Act 5, Battlefields of Eternity, Occupied Ruins, Rogoth the Eternal (spawns with "The Demon Cache" event)
- Act 5, Battlefields of Eternity, Realm of the Banished, Borgoth (rare spawn)
- Act 5, Battlefields of Eternity, The Crag of Eternity, Emikdeva (spawns with "The Demonic Prisoner" event)
- Act 5, Battlefields of Eternity, The Crag of Eternity, Volux the Forgotten (spawns with "The War That Time Forgot" event)

Currently (game version 2.0.3.22427) Malthael also drops the Dice, but this is most likely a bug.

Skull of Raylend - Used for Helm of Rule, Helm

Drops from Colossal Golgors. Confirmed from:
- Act 3, The Keep Depths Level 2, Bholen (bounty target)
- Act 3, Rakkis Crossing, Garganug (rare spawn and bounty target)
- Act 3, Core of Arreat, Gorog the Bruiser (rare spawn and bounty target)

Sydyru Bone - Used for Sydryu Crust, Bow

Drops from Bats. Confirmed from:
- Act 1, Cathedral Level 1, Glidewing (rare spawn and bounty target)
- Act 1, Cathedral Level 2, Firestarter (rare spawn and bounty target)
- Act 1, Fields of Misery, Sicklefang (spawns during the "Carrion Farm" event)
- Act 2, Archives of Zoltun Kulle, Unknown Depths, Hellscream (rare spawn and bounty target)

Symbol of the Guardian Brotherhood - Used for the Guardian's Jeopardy Set

Drops from Demon Troopers. Confirmed from:
- Act 3, Skycrown Battlements, Thromp the Breaker (rare spawn and bounty target)
- Act 3, Skycrown Battlements, Obis the Mighty (rare spawn and bounty target)
- Act 3, Stonefort, Bashface the Truncheon (rare spawn)
- Act 3, Stonefort, Bricktop (rare spawn)
- Act 3, Stonefort, Dragus
- Act 3, The Keep Depths Level 2, The Crusher (rare spawn)
- Act 3, Rakkis Crossing, Busaw (spawns during the "Crazy Climber" event)

Torn Soul - Used for Living Umbral Oath, Ceremonial Knife

Drops from Khazra Shamans. Confirmed from:
- Act 1, Southern Highlands, Chupa Khazra (rare spawn)
- Act 1, Southern Highlands, Lorzak the Powerful (rare spawn and bounty target)
- Act 1, Southern Highlands, Skehlinrath (spawns with the Khazra Camp that has two entrances, one at the SW and another at SE)

Urn of Quickening - Used for Kethrye’s Splint, Bracers

Drops from Lacuni Huntresses. Confirmed from:
- Act 2, Howling Plateau, Saha the Slasher (rare spawn)
- Act 2, Howling Plateau, Taros the Wild (rare spawn and bounty target)
- Act 2, Stinging Winds, Erach (rare spawn)
- Act 2, Desolate Sands, Raiha the Vicious (rare spawn and bounty target)
- Act 3, Fields of Slaughter, Caverns of Frost Level 2, Chiltara (rare spawn)
- Act 3, Fields of Slaughter, Caverns of Frost Level 2, Scathach the Savage (rare spawn)
- Act 3, Fields of Slaughter, Caverns of Frost Level 2, Zelusa the Grasping (rare spawn and bounty target)
- Act 3, Fields of Slaughter, Icefall Caves Level 2, Zelusa the Grasping (rare spawn and bounty target)

Currently (game version 2.0.3.22427) Malthael also drops the Urn, but this is most likely a bug.

White Oak Splinter - Used for Rozpedin's Force, Daibo

Drops from Wood Wraiths. Confirmed from:
- Act 1, Fields of Misery, Secluded Grove, The Old Man (rare spawn)

Wooden Stake - Used for Blitzbolter, Hand Crossbow

Drops from Skeleton Archers. Confirmed from:
- Act 1, Cathedral Level 4, Killian Damort (rare spawn and bounty target)
- Act 3, The Keep Depths Level 3, Belagg Pierceflesh (rare spawn and bounty target)

Woven Plate - Used for Piro Marella, Crusader Shield

Drops from Skeletal Shieldbearers. Confirmed from:
- Act 1, Cathedral Level 4, Captain Cage (rare spawn)
- Act 1, Festering Woods, Enmerkar (spawns during the "Last Stand of the Ancients" event)
- Act 3, The Keep Depths Level 1, Captain Donn Adams (rare spawn)

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