Nightshade Cloak

Dropped by 6

• Gruff level 57 1% 6583
• Lord Darkscythe level 57 0.5% 10826
• Crimson Hammersmith level 60 0% 11120
• Fireguard level 52 0% 8909
• Malyfous Darkhammer level 59 0% 10637
• Spitelash Siren level 52 0% 6195

Dropped by, from a shared table 40+

• Barkskin Den Watcher level 62 61346
• Barkskin Ursa level 62 61342
• Barkskin Windtalker level 62 61347
• Blackhand Assassin level 61 10318
• Blackhand Elite level 61 10317
• Commander Andreon level 61 91919
• Darkflame Imp level 61 62018
• Disrupted Arcane Elemental level 63 61949
• Duskfang Creeper level 63 61935
• Elder Growlheart level 62 61348
• Firewalker level 62 11666
• Forgotten Echo level 61 62607
• Gurubashi Berserker level 62 11352
• Hakkari Shadowcaster level 61 11338
• High Speaker Jam?wahli level 62 63100
• Ima'ghaol, Herald of Desolation level 63 62606
• Infernal Destroyer level 63 62017
• Infinite Rift-Lord level 62 65105
• Lord Xanvarak level 63 61609
• Mana Stalker level 62 61354
• Phantom Guardsman level 61 61200
• Rage Talon Captain level 62 10371
• Rage Talon Fire Tongue level 61 10372
• Ravenous Strigoi level 61 91910
• Relentless Felguard level 62 61351
• Relentless Temptress level 61 61350
• Risen Construct level 61 10488
• Runic Construct level 61 60596
• Shadeflayer Goliath level 61 61533
• Shadowbane Alpha level 63 61191
• Skitterweb Venomfang level 62 61208
• Speaker Gan'hota level 63 61361
• Spectral Worker level 62 61934
• Thuzadin Necromancer level 61 10400
• Vekniss Stinger level 62 15235
• Venom Belcher level 61 10417
• Warbringer Overseer level 63 62019
• Warlord Hanzento level 63 61360
• Withermaw Shaman level 62 62871
• Xalthix level 61 61565

Only the first 40 are listed.

Found in 8

• Old Treasure Chest 3.1% 176944
• Large Mithril Bound Chest 0.8% 153468
• Large Solid Chest 0.8% 153463
• Large Mithril Bound Chest 0.7% 153469
• Large Solid Chest 0.7% 153464
• Solid Chest 0.3% 153454
• Dark Coffer 0.3% 160845
• Solid Chest 0.3% 153453

Contained in 3

• Ahn'Qiraj War Effort Supplies level 1 1.3% 21513
• Thorium Lockbox level 2 0.6% 5759
• Mithril Lockbox level 2 0.4% 5758