In that case, might I suggest running some tutors to grab the Pod?

Fabricate is the most straightforward, but Reshape can sac a golem to get whatever artifact you want as long as you can pay for it and Arcum Dagsson can do that repeatedly. You're in bant, so you can run Wargate to get whatever you want out of your deck, including Birthing Ritual. Enlightened TutorGC puts it on top of your library but may be worth considering. Whir of Invention has improvise, so it can possibly read "UUU get any artifact you want out of your deck"

Another misc card I like a lot in my token decks is Idol of Oblivion as a draw engine.

I hope these suggestions help!

Considering the lifegain theme combined with an aristocrats style gameplay based on creatures dying, I would recommend for your consideration Veinwitch Coven, Pest Infestation, Starscape Cleric, Creeping Bloodsucker, (Possibly, depending on token generation) Mirkwood Bats, and possibly cut Epicure of Blood since 5 mana is a lot to ask for an effect you're getting more efficiently elsewhere.

Also recommend Vito, Thorn of the Dusk Rose for doubling up on life loss, Well of Lost Dreams for a consistent draw engine, Scavenging Ooze for graveyard hate that synergizes with your play pattern, Bloodthirsty Conqueror is a duplicate of Exquisite Blood that goes infinite with your commander, Prosperous Innkeeper for one shot ramp strapped to a soul-sister type of effect, and some sac outlets like Viscera Seer wouldn't go amiss since you really want things to die. Phyrexian Reclamation also suits this playstyle well since you'll likely have more life than you know what to do with, your creatures are mostly cheap to cast, and being able to instant speed recur your creatures to hand is valuable in this archetype.

Hope this helps!

I second the suggestion of Conjurer's Closet, but also Displacer Kitten, Eldrazi Displacer, and maybe some other flicker effects like Cloudshift, Ephemerate, or Flicker.

You could also run some "exiled cards matter" themed pieces since your commander can exile things from the graveyard. Riftsweeper seems like an interesting insert, though maybe not the best option. Riftsweeper is, however, hilarious against Suspend decks

I don't normally say this, but you could actually probably stand to cut a couple of lands. 39 lands is a lot, especially with the surprisingly reasonable amount of ramp/rocks you're running. I'd recommend cutting about 3 for more way to either A- Increase your commander's power for more upkeeps or B- Make your commander unblockable. Bedlam, Cover of Darkness, and even Levitation/Archetype of Imagination would work for the unblockable side of things. As for the power increases, depending on what you're spending your mana on each turn, Firebreathing style effects could work rather well, turning your extra mana into extra damage and upkeep triggers sounds like good fun.

I would also consider Red Elemental Blast because once someone sees your commander they will know hwo the deck is built and will attempt to counter it asap.

Might I also suggest some "everything hurts" cards like Zo-Zu the Punisher, Sunspine Lynx, Spellshock, Spear Spewer, Pyrohemia, Pestilence, and Descent into Avernus.

There's also one of my favorite pet cards, which is objectively bad, but I have to recommend it anyway: Obsidian Fireheart