Hey Fextra, you forgot about the location of the chest containing the Queenslayer Greatsword. It's on a ledge before the cutscene Oliver gets attacked by a Lost revenant.

there is one of those giant anteater looking dudes that has a zweihander of some kind, but i don't know if he drops it. i've gotten random drop items that i don't know what they are called by heart yet, but no weapon drop. from the natural cavern depths bonfire, up the ladder and down the other ladder into the ambush room. past the feeding one on the right, there is another on the right walking around with the weapon.

there is a droppable ladder over the first mistle and i can't figure out how to get to it