I stood my ground, not moving an inch forward, as now I knew for sure that place wasn't an area I should go easily, not now, it was a trap. All the players who would respond to that bounty quest wouldn't be sent here until I enter that land, which I was sure to have something to interfere with my witch's artifacts, and other artifacts perhaps.
So, I had to change my approach, and thus I started to amass the demons inside my prison, without any reservation. After an hour, and amidst a huge battle going on between my artifacts, my players behind me, and those demons, Lady Nada sent another batch of gold, and a single message from one of her guards.
"Our esteemed hero, our Lady sends her greeting to you, and tells you it's done."