After having already created a Keyblade, the Man At Arms blacksmiths had to up the challenge in their return to Kingdom Hearts blades. That’s why the latest episode sees them creating the Oathkeeper Blade.
The Oathkeeper Blade is significantly more challenging than the previous Keyblade as it is so ornate. It has two hearts on its shaft, the hand has two angel wings, and its teeth are formed into the shape of the Kanji for “light.”
Despite the difficulty, Man At Arms pulls it off and, as is tradition, cuts up various objects with the finished Oathkeeper Keyblade afterwards.