"Grandma Flexington's Story: Raid Difficulty" is the side quest from The Horrible Hunger of the Ravenous Wattle Gobbler in Borderlands 2
Side Mission (DLC6) (Optional Mission)
How to start
Speak to Grandma Flexington
Listen to Grandma's Story
TURN IN: Grandma Flexington
XP dum pa Deee! (Purple Rocket Launcher, AKA no Infinity Pistol)
Who wants to hear a story?
And here's a shiny dollar for you -- after all you could buy so much with a dollar back in my day!