The Virus Knight(Sword Art Online Fanfiction)

One day in ALO,A Skill and powerful sword was announced that if

"You beat this Boss,

You will get this Skill."

Then They state the Skill.

"Duel Blade..."Said Kirito."Kirito?"Asuna said."I have to beat that boss.. And get that skill.."Kirito said."But Kirito..The Name of the Announcer is kinda Weird.."Asuna said as kirito ignored her.He got ready for the battle.

What will happen to Kirito if he get that skill and that Dark Virus Looking sword.

Btw all of the characters are above 18 years old. If you're younger. Do not read it. I don't want a minor to read my content. Thanks.

all rights go to the Anime!