Board Thread:General Discussion/@comment-96.224.225.28-20141201045828/@comment-103.252.200.139-20150212234744

it is said to be the strongest weapon because it can severe the world tree from that current realm, and because it stopped the world tree's roots from growing, it is likely an ice sword. Kirito hasn't been seen using it so we don't know if it can cut through metal or steel but in the hands of Oberon, Kirito easily reflected the sword because Sugou cheated to get his title and lvl