The Skull Reaper

The Skull Reaper was the boss of Sword Art Online Floor 75.

Background
Prior to Kirito and Asuna's return to the Knights of the Blood, a party of twenty-member from five different guilds was preparing for the boss fight. When the first ten reached the center of the room, the entrance closed. The gate reopened five minutes later and neither the ten players nor the boss was seen. Like the previous boss, the battle area was also in an anti-crystal field, preventing the ten players from exiting the room.

Abilities
Unlike previous bosses, the Skull Reaper is able to kill high-level players in a single hit with the scythe-like blades on it's arms and tail. It was very difficult to block taking the combined might of Asuna and Kirito to block just one of the blades, while Heathcliff was able to counter the other by himself.

Kills

 * 10 players were killed during the recon of the Skull Reaper
 * 14 players died during the second attempt of clearing the floor