White Skull

• Appears below health bar if you attack a non-skulled player.
• Goes away if you stop interacting with external elements that give you combat log.
• Stays for 15 minutes if you get the killing blow (last hit) on another player.
• Blocks you from entering protection zone.

Important notes:

• You can get an unjustified kill if you deal 50% damage to the target, even if your friend takes the killing blow.
• Attacking a player in party also blocks you from entering protection zone.