A Mega Marvin is an instrument that is commonly used to produce sounds for horror movies.
There are multiple different sizes and the standard Marvin costs $1,500.
Each one is handmade made and also custom made, so no two sound the same.
It looks like a beat up, dirty, black, metal piano without the legs. Instead of keys you have 2 long springs stretched horizontally. There are also a lot of free standing vertical springs spread across the back end. The instrument itself feels eerie and looks exactly like how you'd imagine an instrument that produces spooky sounds would look like.
They were first created in 2016 by two brothers.