The Chaos Blade has innate Regen and occasionally petrifies its target. It is a Holy Knight sword said to be from God. It doesn't fit the clues given in the riddle. There is no mention of it's ability to break shields, or slay demons; nor has it lured anyone to his/her doom. The weapon alluded to in the riddle has a description which fits the 4 parts of the riddle. Keep looking.