In this lesson, we will learn about crimes against property. We will look at what these crimes are, what they mean and take a closer look at some specific examples. Property crime is a category of crime that includes burglary, motor vehicle theft, theft, arson, vandalism and shoplifting.
Heathcliff re-appeared on the 100th Floor as the final boss of the game. During the narration by Kirito afterwards, it was revealed that Kayaba Akihiko's NerveGear had killed him promptly after the battle on the 75th Floor, possibly meaning that the Heathcliff Kirito fought against was his afterimage.
Kirito said to use it on the first person he saw die, and either that first person was Kirito, (Can't remember the order of the episodes) or he saved it, and used it on Kirito, bringing him back to give the final blow. As for Asuna, I think that Sugou prevented her death.