Radahn's greatsword acts like a fist weapon while -handed, as you will Elden Ring Runes dual-wield them with out the want to pick out them up a 2d time in a next playthrough.
The Starcaller Cry weapon artwork stuns and pulls enemies towards you, which you may follow with a devastating gravity explosion. It has a quite extensive range, too, so it makes handling difficult flying enemies a breeze. And even without the weapon art, this greatsword deals a load of harm.
The weapon is heavy, so make sure you have enough staying power to keep a medium equip weight and also you ought to stack just enough intelligence to fulfill the Buy Elden Ring Runes weapon requirement. The Great Jar's Arsenal talisman can help with equip weight, and the Green Turtle Talisman is useful for extra stamina regen.