This one pissed me off to no end...4 hours inside till I figured it out. Thank you Steroids and Cute Veno for the assistance and company lol.
Lord of Captivation
When you port in you see that annoying blue door. To the immediate left you see a Npc:autumn song. Talk to her choose NIGHTMARE GATE. You should be ported facing the Npc again..ignore her this time. Rotate camera till you are facing towards the bridge. Noe if you follow the psth(do not cross bridge no need to). Just go passed the bridge you will see a few mobs immune to physical and wood(this means you are going the right way good job). A caster is definitely wanted to get passed these. You will see towers which are not needed for this bh but for culti ignore if u want. Go around the left curve to the end and you will see the ugliest long legged freak of all time Lord of Captivation. Enjoy