layer killing is decided the instant you cast any hostile spell or make any aggressive action against a non-deadly player. Actually killing the target means little. The only form of player killing allowed is between players whose names appear on 'who deadly' section of the who list. A battle between non-deadly characters is still illegal even if those who are involved have agreed to the combat unless you are in the arena.

Being involved in an illegal pkill is a serious violation of law, and can result in a stay in hell, slay, loss of all equipment, freeze and/or deny or site ban.