...read the trip reports but if you do enough research i suggest
DXM (cough medicine) you need about 5 bottles to get to where you want (4th plateau)
Erowid DXM (Dextromethorphan, DM) Vault
the Legal Herb Salvia Divinorum
Erowid Salvia Divinorum (Ska Pastora) Vault
the next few are very dangerouse im not saying dont do it, just trust your instincts and best judgementaas it is very, very strong and very toxic and not classed as drug but really a poison
what you decribed (ture hullucinations ie seening things that are not there hearing voices skitspherinia etc)
Datura, Brugmaisia, Belladonna (antichlorinogenic diliriants)
Erowid Scopolamine Vault
another similar thing more common but very similar is otc medicines
diphenhydramine
(nytol)
Erowid Diphenhydramine (Benadryl) Vault
and
Dimenhydrinate
(motion sickness stronger hullucinations, terrible bodyload only in US)
Erowid Dimenhydrinate (Dramamine) Vault
(both very unpleasant im told)
also look for Morning Glory Seeds (all garden stores look for heavenly blue or flying sacuers), and more potent Huwien baby woodrose (head shops) both contain Lyseric Acid, like a weaker natural lsd (lyseric acid diathlamide), also side effect cause bad nausea and weak visuals.
why not just try and hook up some ketamine or acid, or buy an ounce of skunk and bake brownies and eat all that to yourself, you will trip balls
you can also combinate different drugs to potentise psychedelics etc,
i suggest opiates that are available at stores such as poppy seeds which are legal most places and if in UK or Canada and eruope u can get Nurofen Plus 12.8mg codiene and do a cold water extraction, but be very careful with dose and minimise your intake.
but do research and check on erowid and
Bluelight is excellent forum just as good as rollitup that has lots of great info about every drug legal or not.