shattered-coreThe Shattered Core is a legendary crafting material used by Blacksmith Haedrig Eamon to craft a 1-Handed Mace named Devastator. It drops off Rockgut (rare spawn) in Act II: The Unknown Depths (located inside Archives of Zoltun Kulle). Rockgut is also a Bounty.

rockgut

Devastator

devastator

devastator-2

devastator-3

ItemItem nameAmount
skullsplitterSkullsplitter1
arcane-dustArcane Dust50
veiled-crystalVeiled Crystal20
forgotten-soulForgotten Soul1
deaths-breathDeath's Breath1
shattered-coreShattered Core1