Expulsom

Expulsom is a rare crafting reagent necessary for many high end Battle for Azeroth profession recipes.

Source
Expulsom can be obtained through several sources. Primarily, it is gained through scrapping Battle for Azeroth armor, weapons, and trinkets. Each weapon and armor item scrapped have a chance to grant one Expulsom, in addition to other crafting reagents. Trinkets (excluding crafted) will always yield 1 Expulsom, but no other crafting reagents. Crafted trinkets (via alchemy) will refund their Expulsom when scrapped, but will not yield any additional Expulsom. Expulsom cannot be obtained via disenchanting.

Alchemy
Expulsom can be created with Alchemy (110) using Transmute: Expulsom; taught by the Kul Tiran and Zandalari alchemy trainers, Clever Kumali and Elric Whalgrene for. This transmute creates 5x Explosum but can only be performed once per day.

Enchanting
Expulsom can be crafted with Enchanting (1) using the conversion, Sanguinated Expulsom; taught by the Kul Tiran and Zandalari enchanting trainers, Emily Fairweather and Enchantress Quinni for.

Questing
In addition to the above sources, Expulsom is a potential reward from specific world quests. The world quests that may reward them are either general turn-in quests (Supplies Needed), or profession restricted quests (Work Orders)

Alchemy

 * Emblazoned Alchemist Stone
 * Eternal Alchemist Stone
 * Endless Tincture of Fractional Power
 * Imbued Alchemist Stone
 * Sanguinated Alchemist Stone
 * Spirited Alchemist Stone
 * Surging Alchemist Stone
 * Tidal Alchemist Stone
 * Endless Tincture of Renewed Combat
 * Potion of Herb Tracking
 * Siren's Alchemist Stone
 * Vial of Obfuscation
 * Mystical Cauldron

Blacksmithing

 * Emblazoned Stormsteel Girdle
 * Emblazoned Stormsteel Legguards
 * Enhanced Stormsteel Girdle
 * Enhanced Stormsteel Legguards
 * Fortified Stormsteel Girdle
 * Fortified Stormsteel Legguards
 * Imbued Stormsteel Girdle
 * Imbued Stormsteel Legguards
 * Sinister Combatant's Cutlass
 * Sinister Combatant's Deckpounder
 * Sinister Combatant's Plate Armguards
 * Sinister Combatant's Plate Boots
 * Sinister Combatant's Plate Gauntlets
 * Sinister Combatant's Plate Greaves
 * Sinister Combatant's Plate Waistguard
 * Sinister Combatant's Polearm
 * Sinister Combatant's Shanker
 * Sinister Combatant's Shield
 * Sinister Combatant's Spellblade
 * Stormsteel Dagger
 * Stormsteel Girdle
 * Stormsteel Legguards
 * Stormsteel Saber
 * Stormsteel Shield
 * Stormsteel Spear
 * Tempered Stormsteel Girdle
 * Tempered Stormsteel Legguards
 * Magnetic Mining Pick
 * Platinum Whetstone
 * Storm Silver Spurs

Enchanting

 * Enchanter's Sorcerous Scepter
 * Honorable Combatant's Sorcerous Scepter
 * Sinister Combatant's Sorcerous Scepter
 * Disenchanting Rod

Engineering

 * AZ3-R1-T3 Bionic Bifocals
 * AZ3-R1-T3 Gearspun Goggles
 * AZ3-R1-T3 Orthogonal Optics
 * AZ3-R1-T3 Synthetic Specs
 * Charged SP1-R1-73D Bionic Bifocals
 * Charged SP1-R1-73D Gearspun Goggles
 * Charged SP1-R1-73D Orthogonal Optics
 * Charged SP1-R1-73D Synthetic Specs
 * Emblazoned Bionic Bifocals
 * Emblazoned Gearspun Goggles
 * Emblazoned Orthogonal Optics
 * Emblazoned Synthetic Specs
 * Finely-Tuned Stormsteel Destroyer
 * Honorable Combatant's Stormsteel Destroyer
 * Honorable Combatant's Discombobulator
 * Imbued Bionic Bifocals
 * Imbued Gearspun Goggles
 * Imbued Orthogonal Optics
 * Imbued Synthetic Specs
 * Mecha-Mogul MK2
 * Precision Attitude Adjuster
 * Sinister Combatant's Discombobulator
 * Sinister Combatant Stormsteel Destroyer
 * SP1-R1-73D Bionic Bifocals
 * SP1-R1-73D Gearspun Goggles
 * SP1-R1-73D Orthogonal Optics
 * SP1-R1-73D Synthetic Specs
 * Super-Charged Engine
 * Surging Bionic Bifocals
 * Surging Gearspun Goggles
 * Surging Orthogonal Optics
 * Surging Synthetic Specs
 * Makeshift Azerite Detector
 * Monolite Fish Finder

Inscription

 * Inscribed Vessel of Mysticism
 * Sinister Combatant's Etched Vessel
 * Darkmoon Card of War
 * Crimson Ink Well

Jewelcrafting

 * Amberblaze Loop
 * Emblazoned Kraken's Eye Loop
 * Eternal Kraken's Eye Loop
 * Honorable Combatant's Intuitive Staff
 * Imbued Kraken's Eye Loop
 * Kraken's Eye Loop
 * Laribole Staff of Alacrity
 * Owlseye Loop
 * Royal Quartz Loop
 * Scarlet Diamond Staff of Intuition
 * Sinister Combatant's Intuitive Staff
 * Spirited Kraken's Eye Loop
 * Tidal Amethyst Loop
 * Tidal Kraken's Eye Loop
 * Kaleidoscopic Lens

Leatherworking

 * Emblazoned Mistscale Boots
 * Emblazoned Mistscale Leggings
 * Emblazoned Tempest Boots
 * Emblazoned Tempest Leggings
 * Enhanced Mistscale Boots
 * Enhanced Mistscale Leggings
 * Enhanced Tempest Boots
 * Enhanced Tempest Leggings
 * Fortified Mistscale Boots
 * Fortified Mistscale Leggings
 * Fortified Tempest Boots
 * Fortified Tempest Leggings
 * Hardened Tempest Boots
 * Hardened Tempest Knuckles
 * Hardened Tempest Leggings
 * Honorable Combatant's Bow
 * Honorable Combatant's Leather Armguards
 * Honorable Combatant's Leather Gauntlets
 * Honorable Combatant's Leather Leggings
 * Honorable Combatant's Leather Treads
 * Honorable Combatant's Leather Waistguard
 * Honorable Combatant's Mail Armguards
 * Honorable Combatant's Mail Gauntlets
 * Honorable Combatant's Mail Leggings
 * Honorable Combatant's Mail Treads
 * Honorable Combatant's Mail Waistguard
 * Imbued Mistscale Boots
 * Imbued Mistscale Leggings
 * Imbued Tempest Boots
 * Imbued Tempest Leggings
 * Mistscale Boots
 * Mistscale Leggings
 * Mistscale Knuckles
 * Recurve Bow of the Strands
 * Sinister Combatant's Bow
 * Sinister Combatant's Leather Armguards
 * Sinister Combatant's Leather Gauntlets
 * Sinister Combatant's Leather Leggings
 * Sinister Combatant's Leather Treads
 * Sinister Combatant's Leather Waistguard
 * Sinister Combatant's Mail Armguards
 * Sinister Combatant's Mail Gauntlets
 * Sinister Combatant's Mail Leggings
 * Sinister Combatant's Mail Treads
 * Sinister Combatant's Mail Waistguard
 * Tempered Mistscale Boots
 * Tempered Mistscale Leggings
 * Tempered Tempest Boots
 * Tempered Tempest Leggings
 * Amber Rallying Horn
 * Tempest Hide Pouch

Tailoring

 * Emblazoned Deep Sea Breeches
 * Emblazoned Deep Sea Gloves
 * Embroidered Deep Sea Breeches
 * Embroidered Deep Sea Cloak
 * Embroidered Deep Sea Gloves
 * Enhanced Deep Sea Breeches
 * Enhanced Deep Sea Gloves
 * Fortified Deep Sea Breeches
 * Fortified Deep Sea Gloves
 * Honorable Combatant's Satin Belt
 * Honorable Combatant's Satin Boots
 * Honorable Combatant's Satin Bracers
 * Honorable Combatant's Satin Cloak
 * Honorable Combatant's Satin Mittens
 * Honorable Combatant's Satin Pants
 * Imbued Deep Sea Breeches
 * Imbued Deep Sea Gloves
 * Sinister Combatant's Satin Belt
 * Sinister Combatant's Satin Boots
 * Sinister Combatant's Satin Bracers
 * Sinister Combatant's Satin Cloak
 * Sinister Combatant's Satin Mittens
 * Sinister Combatant's Satin Pants
 * Tempered Deep Sea Breeches
 * Tempered Deep Sea Gloves
 * Embroidered Deep Sea Bag
 * Rough-hooked Tidespray Linen