King Arthur's Sword? That's Me, Frostmourne

I traveled through time as a sword, but it's still stuck in a stone and can't get out! Zhao Lan felt panicked. Eh? It's actually the Demonic Sword Frostmourne? So if you pull it out next, you must be a filial son? However... "Draw this sword and you will become King of Britain!" "Well, I understand." "Eh? Britain? Did we make a mistake somewhere?" ... "King Arthur! You don't want Britain to fall apart, do you? Let go of that sword!" "I'm sorry, Merlin... There's no turning back." "Why are you talking so much! Kill him, my king! Only the dead are worthy of trust!" ... "Today's Britain has become a country of the dead. King Arthur... The Knights of the Round Table are ready to unite to attack you." "What should I do? The sword in the stone..." "Oh, my king, don't worry, they will surrender under your feet again. In the form of the dead." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.