It takes some finagling, but this could help you keep cards that are meant to only last a single turn on the battlefield for an indefinite period, and if you double up on Warp effects with someone like Tannuk, you can get stuff like the previously mentioned Blightsteel Colossus on the field permanently that much faster
#8 Urborg, Tomb of Yawgmoth A Commander favorite that also sees a ton of Pioneer, and some Modern play, Urborg, Tomb of Yawgmoth gives all lands the ability to tap for black mana
All our playtests have been done with this in mind, and they've been very enjoyable
And under my skin they got, as I would gleefully watch shows about ghosts or read tales of ghoulish haunts
This goes right into my Kresh Into the Red Zone deck, alongside Stalking Vengeance (although well have to make sure we dont deck ourselves by sacrificing Lord of Extinction)
If you can keep Bahamut around to use all four chapters, youre probably winning the game