Malgrinnor Captain's Pauldrons  

 

The shoulders are actually from a box called "a crate of explosives" in the Snarlstone Dens. The crate spawns after you kill the 3rd Ragepaw Elder.
also drops explosives to open the door to Ultrok, the Savage Lord.

a crate of explosives

drops:

Phantasmal Lichen-Covered Shortsword
MAGIC ITEM LORE ITEM ARTIFACT NO TRADE
Slot: PRIMARY
Skill: 1H Slashing Atk Delay: 35
DMG: 45
Effect: Rune III (Combat)
STR: +10 DEX: +5 STA: +5 WIS: +10 INT: +10 HP: +125 MANA: +120 Endurance: +120
SV COLD: +25
WT: 1.5 Size: SMALL
Class: PAL SHD
Race: ALL

High-Powered Gnomish Explosives
LORE ITEM NO TRADE
WT: 0.0 Size: TINY
Class: None
Race: None