A very intense song that switches its mood a lot! It plays during the first phase of Exdeath, the main antagonist.
Please be aware that this port uses a lot of ARAM because of the size of the samples, so certain sound effects (P-Switch, Yoshi, Thunder and maybe others!) will NOT play properly. Keep this in mind if you want to use this in your hack.
6/7 edit: Now it should be able to insert without ARAM errors, but at the cost of not being able to use the original Course Clear jingle (NOT the Boss Clear one; that one is fine). Hopefully it's not that big of a deal since you wouldn't use such a cheerful jingle right after this plays.
Just be careful when omitting samples in the future as this one was a really close call. I wouldn't omit the @5 for submissions that aren't tagged with "boss" since the course clear global song is important for most ports to work with.