The only card that really helps you Voltron that I'm seeing is Empyrial Armor. This seems a bit low to me. If you want to go the Voltron route, I'd consider increasing this a bit. I'd also consider something like Sun Titan or Restoration Specialist in order to recover any key pieces that you lose. Likewise, Mistveil Plains can tuck things on the bottom for Zur to bring back up.
I'm also concerned about your low creature count. It leaves you very vulnerable to Edict types of effects, and while your counterspells will help - if you have to counter every piece of removal that multiple other players are tossing your way, you're going to have a hard time at it.
I'd consider Teferi's Veil in the deck as well, it'll help protect Zur by phasing him out after your attack, making it harder for your opponents to hit him. Notably most wraths and many Edicts are sorcery speed.
I'm also concerned about your low creature count. It leaves you very vulnerable to Edict types of effects, and while your counterspells will help - if you have to counter every piece of removal that multiple other players are tossing your way, you're going to have a hard time at it.
I'd consider Teferi's Veil in the deck as well, it'll help protect Zur by phasing him out after your attack, making it harder for your opponents to hit him. Notably most wraths and many Edicts are sorcery speed.
Retired EDH - Tibor and Lumia | [PR]Nemata |Ramirez dePietro | [C]Edric | Riku | Jenara | Lazav | Heliod | Daxos | Roon | Kozilek