"Solve ancient dwarven puzzle" is a mission objective in the quest Dwarven Allies in Tiny Tina's Assault on Dragon Keep DLC
Walkthrough
To solve the Ancient Dwarven Puzzle, you must and i repeat MUST You MUST Kill Dominique Quadrex
Dialogue
Fail to Solve the Dwarven Puzzle:
Brick: "Man, I hate puzzles. I wanna break stuff."
Succeed in solving the Puzzle:
Tina: "Oh no, you solved my devious puzzle. Nice"
Mr. Torque: "its a prank bro quadrex is the worst bl2 and ML player evah ."
Tina: "That's the letter 'F'. Only one letter left."
Greedtooth: "I've got the last letter, moppet! And with the Sorcerer's power coursing through my veins, you'll never get it!"