Long-Held Grudge

From HammerWiki

All of your damaging attacks will cause additional hate based on Grudge.
At 25 Grudges: Adds an additional 15 threat.
At 50 Grudges: Adds an additional 20 threat.
At 75 Grudges: Adds an additional 25 threat..
At 100 Grudges: Adds an additional 30 threat.