The Fatal Scythe

«The Fatal Scythe» (ザ・フェイタルサイズ) is the Boss of the Hidden Dungeon located beneath the Starting City on the first floor of Aincrad. Its armaments include a large powerful scythe, and a long, ragged black cloak. It was fought by Asuna and Kirito when they were trying to help Yulier rescue her guild leader, Thinker, who had been trapped in the area's safe zone. Its battle level is unknown, but Kirito suspected it to be as powerful as the 90th Floors' bosses. This was proven when it was able to send both Kirito and Asuna flying, despite them blocking its strike together. It was only through the intervention of Yui that The Fatal Scythe was defeated.

It is unclear, but one can easily assume that Kirito and Asuna would not have survived the fight, had Yui not intervened by using the GM console.

Appearance
The Fatal Scythe greatly resembles the Grim Reaper, being skeletal in appearance, being massive in size as with other bosses, and being clad in a tattered black robe (red inside) and carrying a large silver scythe.

Abilities
The Fatal Scythe is an extremely powerful boss, befitting its name, one swing from its scythe could send both Kirito and Asuna flying (both had blocked the attack together), and taking out half of their HP at the same time. The boss also prefers to attack in the shadows, as it had attacked Yulier from a side passage in the corridor and was not seen until the corridors around the safe area began to change. The scythe is very powerful, as mentioned above, and also durable, as it had lasted for several seconds before being destroyed by the GM deleter console in the form of a sword.

Presuming that it is a more stronger verison of The Skull Reaper, it is highly likely that the boss is also capable of doing instant kill hits, with the additional benefit of players attempting to block its attacks get dealt with half of their HP as damage. As The Skull Reaper has five health bars, it is highly likely that this boss may have had more health bars (perhaps six or more). The boss is also unidentifiable in terms of battle level, making Kirito presume that the boss was similar to one of the Floor 90 bosses, and considering the immense strength, does not seem too far fetched.

Trivia

 * The Fatal Scythe may similar qualities to Nicholas The Renegade. Their eyes also seem to move irregularly, as when the Fatal Scythe was deflected from Yui's Immortal Object status, it moved its eyes around, which Nicholas The Renegade also does when it was battling Kirito.

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