Items that activates Essence Aura from Outworld Devourer

These are the items that will activate Essence Aura from Outworld Devourer / Obsidian Destroyer. They will give 25% mana and has a 40% chance to proc.

Dust of Appearance 
Animal Couriers
Observer Wards
Sentry Ward 
Blink Dagger 
Ghost Scepter 
Buckler 
Tranquil Boots 
Medallion of Courage 
Arcane Boots 
Drum of Endurance (can be used even where there are no charges left) 
Pipe of Insight 
Force Staff 
Necronomicon (Level 2 and 3 only) 
Eul's Scepter of Divinity 
Dagon 
Veil of Discord 
Rod of Atos 
Orchid Malevolence 
Scythe of Vyse 
Shadow Blade 
Ethereal Blade 
Abyssal Blade 
Black King Bar 
Shiva's Guard 
Manta Style 
Bloodstone (LOL) 
Diffusal Blade 
Heaven's Halberd 
Mjollnir 
Satanic
Okay a few notable ones. Dusts and Wards do activate Essence Aura which could be broken if abused. Think about it. A Storm Spirit without Mana, casts Dust plants Sentry and Wards has a chance to regain back all his Mana. I wonder if these items remove Curse of Silence Debuff. Hmm.
OK do take note of a few practical ones. Mainly dusts and Drums without charges. This could mean life or death for certain Heroes like Skeleton King etc. Just pop a dust or click drum once and regain back 25% or more of your mana enough to cast 1 more spell. Could be potentially game changing.
SO ALL TAKE NOTE : DRUMS AND DUSTS ACTIVATE ESSENCE AURA WHICH HAS A CHANCE TO REGAIN BACK A PORTION OF YOUR MANA. YOU CAN ACTIVATE DRUMS WITHOUT CHARGES.
As of 240613