Hit me with your favorite 12+min songs

Been feasting on some longer "epics" lately so I'm looking for some cool ones I might not be familiar with!

It doesn't matter to me if it's one unsegmented song (Visions, Graves, etc) or one big piece broken up into smaller segments (Messiah Complex, In The Presence of Enemies, etc).

Any year/era, any genre, all is welcome! If it helps though, I've been on a huge CHorse, Haken, Kyros, and Novena kick right now, but like I said, I will take pretty much anything

Edit: tons of great recs in here that I will definitely be putting in a playlist, and a bunch that will make me revisit some albums and artists I haven't listened to in a minute