Word of Power
From Dawn of Corruption Wiki
Kanathar's name is boundless, and it forever seeks to ascend its frail imp hosts into gods.
How to Unlock
Spread the name of a demon god.
You must first have unlocked the Achievement [Memories of Kanathar]. Without this Achievement, you can't do the next step. Once this is done, complete the Imp's quest line and recruit him (any version). You'll then have the possibility of revealing his Name. Do it.
Strength + 10
XP Multiplier + 0.30