Arc the Lad 2 Item Complete Episode 149「Vorpal Scythe」

Obtain the Vorpal Scythe from the Lich on B49F. Ravish is ineffective. The blacksmithing limit can be raised to 60 with the strongest scythe, but it costs 480,000 G; Equip Elk with a Unicorn Horn. Like the ultimate bomb in the last dungeon, some items cannot be obtained without equipping a Unicorn Horn. I actually obtained two Calm floor items before successfully obtaining the Vorpal Scythe. Does this mean the floor items are changing, or is it an internal bug?