Do I need the sword-whip to complete the weapon collection? I am missing one sword, here's the list of those in my possession already

Short sword, Longsword, Ulfberht sword, Invisible blade, Harpe, Murgleis, Red umbrella, Blutgang, Fragarach, Hofud, Dainsleif, Florenberg, Caladbolg, Ridill, Bandit blade, Blue rose, Bloodbringer, Valkyrie sword, Flying edge, Oracle blade, Rhava Bural, Rhava Velar and all 8-Bit coin swords.