According to Se the list key ítems go

Key Item Notorious Monster
Fabricated ward of impurity Palloritus
Fabricated ward of miasma Rancibus
Fabricated ward of biting winds Putraxia
Fabricated ward of ashen wings Perfidien
Fabricated ward of the false King Plouton

However i did vagary last night and i wasnt getting the key ítem what i was supposed to get.

i dif Palloritus ans he did drop 2 key ítems
Fabricated pearl of impurity reular key ítem
and
Fabricated ward of biting winds this one is supposed to be Putraxiac key ítem