Plague is a fairly rare, but very dangerous, version of Poison. Players and NPCs afflicted with the plague will emit a hollow sound like a high wind or a guttural moan and be covered in grainy black fog. It rapidly depletes HP, making it virtually impossible to survive without some means of curing it, or a large supply of powerful healing items or miracles. It also weakens the effects of healing items and slows Stamina regeneration.
The following is a list of magic and weapons that can inflict Plague.