Profet93 Deckster

Hey! +1 from me. I run a mono black deck that runs similar to getting "big black mana" . Feel free to check it out for some ideas. Moving onto the suggestions...

Mirage Mirror Utility. Copy coffers, useful artifact or big dude.

Candelabra of Tawnos - Budget allowing, it untaps coffers and it's various copies. My favorite card.

From what i can tell, you don't have any way to mitigate black's biggest weakness (aside from scour and steel helkite), against artifacts and enchantments. As such, you should add some/all of the following...

Nevinyrral's Disk

Oblivion Stone - For those turns u tutor for a boarwipe and need to use it on the same turn (nev disk doesnt let u since it ETBs tapped)

Ugin, the Spirit Dragon - Similar to the above to, but exile can be crucial (ex: purphurous when it isnt a creature so u can't use ashes to ashes).

Karn Liberated - Targeted exile removal (upgrade to scour)

All Is Dust

There are others but those are my favorite. Should they be unavailable to you due to budget or can't find it, let me know and I'll offer budget replacements that are similar.

Black's strengths are tutors, I feel you should use at least 1 - 2 more to improve consistency

Diabolic Revelation - Since you're ramping hard, might as well find all your wincons (and perhaps a Reliquary Tower as land per turn). Also, ADD RELIQUARY TOWER! You are running necropotence!

Mastermind's Acquisition > Diabolic Tutor

Since you like to win with big X spell (your commander), it would suck if it gets countered. As such, you should DEFINITELY add Imp's Mischief. Using imp's mischief, you can change the target of counterspell to imp's mischief, leaving the original spell (ur commander or whatever) intact. No one suspects it, plus its amazing to use on cards like "TARGET player gets two extra turns" ... I wonder who you will target, haha!

Yawgmoth's Will - Budget permitting

Im curious on your thoughts on Strionic Resonator to copy your ETB effects (namely your commander). Also want your opinion on Rings of Brighthearth to combo with Deserted temple, coffers and a lot of swamps to make infinite mana and win your with commander. Should you go this route, you might want to consider adding a Basalt Monolith as well for infinite colorless mana.

Get back to me with your thoughtsenter link description here

Atmosphere +1 from me just for the name.

Im not a judge chosenone124 but since the lands arent entering the battlefield, only changing control, then Im not sure you would get the land fall trigger.

The only land thats "falling" is under your control cricket sounds

The deck looks pretty solid. It's hard to tell what to add until I see how the deck performs in paper. That being said, what do you feel is your greatest weakness?

For example, one of the few ways to stop slivers is through mass wipes such as all is dust or Ugin. You have teferi's protection which is solid as well as boros charm.