As mentioned earlier, there are other variants of this character that have yet to be introduced
Scuttlemutt is a unique card that is functional in a vacuum as nothing more than a ramp and fixing effect, yet the effects of colour-changing transform it into a card which has the potential to be a powerful player in many archetypes, if you can just design the perfect cube for it
For fans of villainy in all its forms, you'll find Davros, Dalek Creator and Missy in the Masters of Evil deck
If you are playing mono black, then youll be swamped by Swamps, so Defile will grow with the game length
It can't be removed by artifact sweepers, which we see is totally cool and fine with The One Ring, and worst case it represents inevitability on top of untapped mana ramp at 2, the best one could ask for
Your deck only has a few mana sinks, none of which are particularly amazing