I think building around unearth is the wrong take. The creature gets exiled that way and I can't loop with that. The reanimate cards are perfect though. You're making a TON of mana with this commander. Planar bridge shines soooo bright.
Adding to this, in my experience this commander plays almost like K'rrik (who is also a great card in the 99)-- except he costs one less, has more base power/toughness, and if you lean colorless/artifact deck will generate significantly more mana at no life cost.
This gave me some really good ideas for my own szeras deck! Two really fun cards that I'd recommend are Deepwood Legate and Demon of Death's Gate Demon of Death's Gate is an all time favorite of mine. He's a 6BBB 9/9 flying trampler, BUT you can cast him for 0 mana by sacrificing 3 black creatures and paying 6 life! With all your tokens, getting either a game ending statline or 9 free mana at your disposal is a cinch! Deepwood Legate is a charming creature who costs 3B and says if *anyone* has a forest, you get to cast him for FREE! Imagine if dark ritual put you up 4 mana, that's what Legate is in this deck 90% of the time (if you're really afraid of no one having a forest, though personally i wouldn't be, you can technically add in yavimaya cradle of growth) There's also some other fun cost reducers like K'rrik and Defiler who just make all your creatures net positive off szeras, but I think they sadly don't think they work with unearth. That said, I hope you have a ton of fun with Szeras! EDHREC only suggested playing him with artifact creatures, so I found your video much more insightful!
