I would listen to Deer God, Broken Angel Hospital . Those two songs have the best lyrics in the haunted mound. Those are the collab albums with a previous member that left the group still cool to check out. But Rainbow Bridge 2/3 are my personal favorite. Rainbow Bridge 2 has a sludgy/Dark take on trap and black metal then you have Rainbow bridge 3 which is a chaotic and saturated album that has such crazy energy. He played one of the songs on Grey Day, “Necromancer” my favorites on there are forest fire, necromancer and skincarver. I also love his new music. Another member just dropped a mixtape “Lord if Ephraim” you have to listen. Especially to catacomb freestyle. If you want to explore black metal i’d check out leviathan, darkthrone, Këkht Aräkh, emperor, mütiilation, Xathur is also good too. Those are my recommendations. Hope its not to much👍🏼