In Elden Ring, which boss drops the Grafted Blade Greatsword?

In Elden Ring, Leonine Misbegotten drops the Grafted Blade Greatsword.

The boss is found at Castle Morne on the Weeping Peninsula. Defeating Leonine Misbegotten awards the Grafted Blade Greatsword, a colossal sword whose design recalls the many blades fused into the weapon’s name. Its skill, Oath of Vengeance, temporarily raises several attributes and poise.

The name can be confused with Godrick the Grafted, the demigod ruler of Stormveil Castle. Godrick is also associated with grafting, but he does not drop this weapon. The Misbegotten Warrior is a separate enemy and appears in other encounters.

Castle Morne’s questline also involves Edgar, the castle’s castellan. Players can explore the fortress and surrounding peninsula before or after challenging the boss, making the weapon an early optional reward for adventurers willing to travel south of Limgrave.