SideQuest - Sticks and Stones - Darksiders 2
You'll find Blackroot in The Fjord; just look for the trader icon to the west. He'll give you the Lure Stone which allows Redemption to gather the stonebites.
Mystic Stonebites (34)
Power Stonebites (25)
Resistance Stonebites (10)
Refer to this guide's Collectable section for more information