Borderlands 2: Red Text The thunder shall bring forth the pain

Rolling Thunder. The red text effect says "The thunder shall bring forth the pain!". Borderlands 2 Red Text Grenades

"The thunder shall bring forth the pain!" is a red text modifier on grenades in Borderlands 2

Found on the following red text grenade mod: Rolling Thunder, a drop from Old Slappy or Wilhelm, and item of the day from Torgue Vending Machine.

What this red text does

Grenade stays low on ground, explosive bounce.