Kanuchan's Hammer Wasn't Built in a Day - S1.E70

After hearing that Briar is at Terasu Pool, Liko and the others start climbing Oni Mountain. On the way, Kanuchan is overjoyed to spot some nice iron, and starts pounding it with its hammer. Dot is overwhelmed with emotions from seeing Kanuchan's hammer grow in size so suddenly... but then a wild Otoshidori shows up and takes Kanuchan's iron.