Board Thread:General Discussion/@comment-86.169.78.147-20150412145140/@comment-80.66.225.147-20170511120629

Weapons have durability, right? We also know that Kirito always goes to Liz to repair the swords regularly(Filling up Durability to be exact). Since the final battle against Heathcliff was directly after the Skull-Reaper boss fight, the Dark Repulser was probably almost down and there was no way to repair the weapon. Kirito probably relised that it's about to break which is why he already said goodbye in his mind.