The Dark Souls series offers a variety of cool weapon, with the Farron Greatsword being a fine example. The Dancer's Enchanted Swords and Ringed Knight Paired Greatswords offer power and fun ...
The Greatsword is looted from a corpse on top of a broken bridge in Farron Keep. Given how satisfying it is to swing this mega-sword at enemies, at least its last wielder probably died happy.