Bit late noticing this thread, but I experienced entity contact on a combination of 2C-B and MXE, which I wrote a trip report about. It was full on, predator style translucent figures in the room with me, some of them maybe human or had once been human, some of them something else. The central figure materialised out of some kind of amorphous metallic rotating tesseract, and I heard (in my mind - I can tell the difference, I think, between a true auditory hallucination and just an imagined voice - but at the time, it felt like the voice speaking was not mine) some kind of message which honestly I kind of forget about my place in the universe and the purpose and true nature of reality, I enquired about my deceased father and was told he was present, but could not communicate with me directly, for those were the rules of this bizarre situation. Then they all kind of dissolved into flat sheets which layered together and were absorbed into this metallic rotating hyperdimensional shape which was at this point making some kind of oscillating humming noise and spinning faster and faster, until it snapped out of existence and the beings were gone.
Shortly afterwards I had walked into another room and experienced a feeling of presence like nothing else I had ever felt, honestly the only way I can describe it is that I was touched somehow by the creator of the universe, maybe just by being observed, maybe by some kind of energy from a place outside reality. I actually fell to my knees I think and bowed down in humility and respect until the feeling passed, after which I felt incredible, and so grateful to be alive.
That was my most lucid entity contact experience. But I also experienced a "presence of God" type of experience on, I think, 4-AcO-DMT and possibly a little ketamine. At that time it appeared like "God" was somehow reaching into this world, through the light in my ceiling - and again I felt an incredible sense of humbleness and gratitude, and I actually spoke to what I perceived to be capital G God of the universe and asked them to please look after my family and friends and thank you for everything I have... mad stuff looking back, that was years ago now actually, but it was so powerful and honestly somehow perhaps more "divine" feeling than the 2C-B/MXE experience I described above, where the initial entity contact was with supernatural beings but not "God", and the presence I felt after - while I was equally humbled by it - was somehow different, more neutrally curious and observing me, rather than a clean, tryptamine-pure sense of divine love that I got from the 4-AcO-DMT experience.
Actually I've got just one more - this wasn't really entity contact as such but on a mix of 3-HO-PCP and 4-HO-MET, I experienced presence, again, this time not gods, as such, but operators of the reality machine (this was a "reality is a simulation" type of experience)... but quickly it was like they became a part of me, and from then on the rest of the trip honestly was just far too strange and felt actually pretty solitary, So that one I'll put down as borderline entity contact.
I think that's it... I haven't properly tripped in a long while in all honesty. Tryptamines and dissociatives are pretty reliable inducers of some form of communion with the divine though, in my experience. Tryptamines alone I think would be far purer, but less reliable. But a well planned heavy dose in the right setting... I'm sure entity contact is possible.
For the record I'm not making any claims about the objective reality of any of this, I just don't know. It would be easy for me to just dismiss all of it as drug induced delusions, and maybe they all were. But I'm somehow hesitant to completely dismiss the possibility that something otherworldly occurred. I wouldn't say that obviously in certain situations lest I be labelled a crazy person, which maybe I am.