A Kora! It’s an African instrument that is considered a guitar harp, with 21 strings ranging from the size of bass guitar string to fishing wire. The way it is played allows you to play the bass, lead, and rhythm at the same time. Here is a short example of a master kora player Toumani Diabate showcasing the instrument: https://youtu.be/8luhdxS2KuM?si=llpa2YVyIOf77_Nd
As a guitarist I found this guy who transcribed Toumani’s work onto a classical guitar, very interesting listen https://m.youtube.com/watch?v=55QnOlXckOk
My other thing would be trippy out there instruments that seem to put you in a different state of mind like the Yaybahar or “The Beam” that the grateful dead likes to break out sometimes
Yaybahar example: https://m.youtube.com/watch?v=_aY6TxC1ojA&pp=ygUWeWVoYWJhciBhdCBpbnN0cnVtZW50IA%3D%3D
The Beam example: https://m.youtube.com/watch?v=0h8o-1IQ5G0&pp=ygUSZ3JhdGVmdWwgZGVhZCBiZWFt
You can actually train yourself to lucid dream the entire time, it takes a lot of work though. I worked on it for a while and could consciously fall into rem sleep, great resources for it online. Buddhist monks developed most of the modern technique, you basically meditate into a dream state. You get so much more control that way, it’s like having a holodeck when it works.